diff --git a/Sources/Bluetooth/Address.swift b/Sources/Bluetooth/Address.swift
index eb549d7ac..24a1ce67e 100644
--- a/Sources/Bluetooth/Address.swift
+++ b/Sources/Bluetooth/Address.swift
@@ -10,7 +10,7 @@ import Foundation
 
 /// Bluetooth address.
 @frozen
-public struct BluetoothAddress: ByteValue {
+public struct BluetoothAddress: ByteValue, Sendable {
     
     // MARK: - ByteValueType
     
diff --git a/Sources/Bluetooth/BitMaskOption.swift b/Sources/Bluetooth/BitMaskOption.swift
index 13c4272f0..e60f136b9 100644
--- a/Sources/Bluetooth/BitMaskOption.swift
+++ b/Sources/Bluetooth/BitMaskOption.swift
@@ -105,6 +105,10 @@ public struct BitMaskOptionSet <Element: BitMaskOption>: RawRepresentable {
     }
 }
 
+// MARK: - Sendable
+
+extension BitMaskOptionSet: Sendable where RawValue: Sendable { }
+
 // MARK: - Sequence Conversion
 
 public extension BitMaskOptionSet {
diff --git a/Sources/Bluetooth/BluetoothUUID.swift b/Sources/Bluetooth/BluetoothUUID.swift
index b08a6ec7d..810d1b7fa 100644
--- a/Sources/Bluetooth/BluetoothUUID.swift
+++ b/Sources/Bluetooth/BluetoothUUID.swift
@@ -10,7 +10,7 @@ import Foundation
 
 /// Bluetooth UUID
 @frozen
-public enum BluetoothUUID: Equatable {
+public enum BluetoothUUID: Equatable, Hashable, Sendable {
     
     case bit16(UInt16)
     case bit32(UInt32)
@@ -39,23 +39,6 @@ extension BluetoothUUID: CustomStringConvertible {
     }
 }
 
-// MARK: - Hashable
-
-extension BluetoothUUID: Hashable {
-    
-    public func hash(into hasher: inout Hasher) {
-        
-        switch self {
-        case let .bit16(value):
-            return value.hash(into: &hasher)
-        case let .bit32(value):
-            return value.hash(into: &hasher)
-        case let .bit128(value):
-            return value.hash(into: &hasher)
-        }
-    }
-}
-
 // MARK: - RawRepresentable
 
 extension BluetoothUUID: RawRepresentable {
diff --git a/Sources/Bluetooth/ClassOfDevice.swift b/Sources/Bluetooth/ClassOfDevice.swift
index e8f71cfeb..be532c115 100644
--- a/Sources/Bluetooth/ClassOfDevice.swift
+++ b/Sources/Bluetooth/ClassOfDevice.swift
@@ -8,7 +8,7 @@
 
 import Foundation
 
-public struct ClassOfDevice: Equatable {
+public struct ClassOfDevice: Equatable, Sendable {
     
     internal static let length = 3
     
@@ -100,7 +100,7 @@ public struct ClassOfDevice: Equatable {
 
 extension ClassOfDevice {
     
-    public struct FormatType: RawRepresentable, Equatable, Hashable {
+    public struct FormatType: RawRepresentable, Equatable, Hashable, Sendable {
         
         public static let min = FormatType(0b00)
         
@@ -109,15 +109,12 @@ extension ClassOfDevice {
         public let rawValue: UInt8
         
         public init?(rawValue: UInt8) {
-            
             guard rawValue <= type(of: self).max.rawValue, rawValue >= type(of: self).min.rawValue
                 else { return nil }
-            
             self.rawValue = rawValue
         }
         
         private init(_ unsafe: UInt8) {
-            
             self.rawValue = unsafe
         }
     }
@@ -125,7 +122,7 @@ extension ClassOfDevice {
 
 public extension ClassOfDevice {
     
-    enum MajorServiceClass: UInt16, BitMaskOption {
+    enum MajorServiceClass: UInt16, BitMaskOption, Sendable {
         
         /// Limited Discoverable Mode [Ref #1]
         case limitedDiscoverable = 0b01
@@ -170,7 +167,7 @@ public extension ClassOfDevice {
 
 public extension ClassOfDevice {
     
-    enum MajorDeviceClass: Equatable {
+    enum MajorDeviceClass: Equatable, Sendable {
         
         /// Miscellaneous
         case miscellaneous
@@ -273,7 +270,7 @@ public extension ClassOfDevice {
         }
     }
     
-    enum MajorDeviceClassType: UInt8 {
+    enum MajorDeviceClassType: UInt8, Sendable {
         
         /// Miscellaneous
         case miscellaneous = 0b00
@@ -328,7 +325,7 @@ public extension ClassOfDevice {
 
 public extension ClassOfDevice.MinorDeviceClass {
     
-    enum Computer: UInt8 {
+    enum Computer: UInt8, Sendable {
         
         /// Uncategorized
         case uncategorized = 0b00
@@ -358,7 +355,7 @@ public extension ClassOfDevice.MinorDeviceClass {
 
 public extension ClassOfDevice.MinorDeviceClass {
 
-    enum Phone: UInt8 {
+    enum Phone: UInt8, Sendable {
         
         /// Uncategorized, code for device not assigned
         case uncategorized = 0b00
@@ -382,7 +379,7 @@ public extension ClassOfDevice.MinorDeviceClass {
 
 public extension ClassOfDevice.MinorDeviceClass {
     
-    enum NetworkAccessPoint: UInt8 {
+    enum NetworkAccessPoint: UInt8, Sendable {
         
         /// Fully available
         case fullyAvailable = 0b00
@@ -412,7 +409,7 @@ public extension ClassOfDevice.MinorDeviceClass {
 
 public extension ClassOfDevice.MinorDeviceClass {
     
-    enum AudioVideo: UInt8 {
+    enum AudioVideo: UInt8, Sendable {
 
         /// Uncategorized, code not assigned
         case uncategorized = 0b00
@@ -469,7 +466,7 @@ public extension ClassOfDevice.MinorDeviceClass {
 
 public extension ClassOfDevice.MinorDeviceClass {
     
-    enum PeripheralKeyboardPointing: UInt8 {
+    enum PeripheralKeyboardPointing: UInt8, Sendable {
         
         /// Not Keyboard / Not Pointing Device
         case notKeyboard = 0b00
@@ -484,7 +481,7 @@ public extension ClassOfDevice.MinorDeviceClass {
         case comboKeyboardPointingDevice = 0b11
     }
     
-    enum PeripheralDevice: UInt8 {
+    enum PeripheralDevice: UInt8, Sendable {
         
         /// Uncategorized device
         case uncategorized = 0b00
@@ -520,7 +517,7 @@ public extension ClassOfDevice.MinorDeviceClass {
 
 public extension ClassOfDevice.MinorDeviceClass {
 
-    enum Imaging: UInt8, BitMaskOption {
+    enum Imaging: UInt8, BitMaskOption, Sendable, CaseIterable {
         
         /// Uncategorized
         case uncategorized = 0b00
@@ -536,20 +533,12 @@ public extension ClassOfDevice.MinorDeviceClass {
         
         /// Printer
         case printer = 0b1000
-        
-        public static let allCases: [ClassOfDevice.MinorDeviceClass.Imaging] = [
-            .uncategorized,
-            .display,
-            .camera,
-            .scanner,
-            .printer
-        ]
     }
 }
 
 public extension ClassOfDevice.MinorDeviceClass {
     
-    enum Wearable: UInt8 {
+    enum Wearable: UInt8, Sendable {
         
         /// Uncategorized
         case uncategorized = 0b00
@@ -573,7 +562,7 @@ public extension ClassOfDevice.MinorDeviceClass {
 
 public extension ClassOfDevice.MinorDeviceClass {
     
-    enum Toy: UInt8 {
+    enum Toy: UInt8, Sendable {
         
         /// Uncategorized
         case uncategorized = 0b00
@@ -597,7 +586,7 @@ public extension ClassOfDevice.MinorDeviceClass {
 
 public extension ClassOfDevice.MinorDeviceClass {
     
-    enum Health: UInt8 {
+    enum Health: UInt8, Sendable {
         
         /// Uncategorized
         case uncategorized = 0b00
diff --git a/Sources/Bluetooth/CompanyIdentifier.swift b/Sources/Bluetooth/CompanyIdentifier.swift
index 93f55d066..e7dff969a 100644
--- a/Sources/Bluetooth/CompanyIdentifier.swift
+++ b/Sources/Bluetooth/CompanyIdentifier.swift
@@ -23,7 +23,7 @@
 ///
 /// - SeeAlso: [Company Identifiers](https://www.bluetooth.com/specifications/assigned-numbers/company-identifiers)
 @frozen
-public struct CompanyIdentifier: RawRepresentable, Equatable, Hashable {
+public struct CompanyIdentifier: RawRepresentable, Equatable, Hashable, Sendable {
     
     public var rawValue: UInt16
     
diff --git a/Sources/Bluetooth/LowEnergyAdvertisingData.swift b/Sources/Bluetooth/LowEnergyAdvertisingData.swift
index eca2ed757..b5c8e31cb 100644
--- a/Sources/Bluetooth/LowEnergyAdvertisingData.swift
+++ b/Sources/Bluetooth/LowEnergyAdvertisingData.swift
@@ -12,7 +12,7 @@ import Foundation
 ///
 /// ![Image](https://github.com/PureSwift/Bluetooth/raw/master/Assets/LowEnergyAdvertisingDataExample1.png)
 @frozen
-public struct LowEnergyAdvertisingData {
+public struct LowEnergyAdvertisingData: Sendable {
     
     // MARK: - ByteValue
     
diff --git a/Sources/Bluetooth/LowEnergyScanTimeInterval.swift b/Sources/Bluetooth/LowEnergyScanTimeInterval.swift
index 70ebf7ce5..78d37a110 100644
--- a/Sources/Bluetooth/LowEnergyScanTimeInterval.swift
+++ b/Sources/Bluetooth/LowEnergyScanTimeInterval.swift
@@ -12,7 +12,7 @@
 /// Time = N * 0.625 msec
 /// Time Range: 2.5 msec to 10240 msec
 @frozen
-public struct LowEnergyScanTimeInterval: RawRepresentable, Equatable, Comparable, Hashable {
+public struct LowEnergyScanTimeInterval: RawRepresentable, Equatable, Comparable, Hashable, Sendable {
     
     /// 2.5 msec
     public static let min = LowEnergyScanTimeInterval(0x0004)
diff --git a/Sources/Bluetooth/RSSI.swift b/Sources/Bluetooth/RSSI.swift
index 671c2b6b7..4e4575e01 100644
--- a/Sources/Bluetooth/RSSI.swift
+++ b/Sources/Bluetooth/RSSI.swift
@@ -12,7 +12,7 @@
 /// Range: -127 ≤ N ≤ +20
 /// Units: dBm
 @frozen
-public struct RSSI: RawRepresentable, Equatable, Hashable {
+public struct RSSI: RawRepresentable, Equatable, Hashable, Sendable {
     
     /// Units: dBm
     public let rawValue: Int8
diff --git a/Sources/Bluetooth/SFloat.swift b/Sources/Bluetooth/SFloat.swift
index 83948a684..e4f8ec45e 100644
--- a/Sources/Bluetooth/SFloat.swift
+++ b/Sources/Bluetooth/SFloat.swift
@@ -30,7 +30,7 @@ public extension Float16 {
 
 /// IEEE-11073 16-bit SFLOAT
 @frozen
-public struct SFloat: Equatable, Hashable, Codable {
+public struct SFloat: Equatable, Hashable, Codable, Sendable {
     
     /// The bit pattern of the value’s encoding.
     public private(set) var bitPattern: UInt16
diff --git a/Sources/Bluetooth/SecurityLevel.swift b/Sources/Bluetooth/SecurityLevel.swift
index b50518cef..1905b3d7f 100644
--- a/Sources/Bluetooth/SecurityLevel.swift
+++ b/Sources/Bluetooth/SecurityLevel.swift
@@ -7,7 +7,7 @@
 //
 
 /// Bluetooth security level.
-public enum SecurityLevel: UInt8 {
+public enum SecurityLevel: UInt8, Sendable {
     
     case sdp        = 0
     case low        = 1
diff --git a/Sources/Bluetooth/UInt128.swift b/Sources/Bluetooth/UInt128.swift
index 364ac8667..8729cad3b 100644
--- a/Sources/Bluetooth/UInt128.swift
+++ b/Sources/Bluetooth/UInt128.swift
@@ -11,7 +11,7 @@ import Foundation
 ///
 /// Unlike `NSUUID` which is always stored in big endian.
 @frozen
-public struct UInt128: ByteValue {
+public struct UInt128: ByteValue, Sendable {
     
     public typealias ByteValue = (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)
     
diff --git a/Sources/Bluetooth/UInt24.swift b/Sources/Bluetooth/UInt24.swift
index 778909dd1..445a8f24f 100644
--- a/Sources/Bluetooth/UInt24.swift
+++ b/Sources/Bluetooth/UInt24.swift
@@ -10,7 +10,7 @@ import Foundation
 
 /// A 24 bit number stored according to host endianness.
 @frozen
-public struct UInt24: ByteValue {
+public struct UInt24: ByteValue, Sendable {
     
     public typealias ByteValue = (UInt8, UInt8, UInt8)
     
diff --git a/Sources/Bluetooth/UInt256.swift b/Sources/Bluetooth/UInt256.swift
index 4d6f11c25..9dd0ff0a1 100644
--- a/Sources/Bluetooth/UInt256.swift
+++ b/Sources/Bluetooth/UInt256.swift
@@ -10,7 +10,7 @@ import Foundation
 
 /// A 256 bit number stored according to host endianness.
 @frozen
-public struct UInt256: ByteValue {
+public struct UInt256: ByteValue, Sendable {
     
     public typealias ByteValue = (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)
     
diff --git a/Sources/Bluetooth/UInt40.swift b/Sources/Bluetooth/UInt40.swift
index b8012030d..d5fc3045c 100644
--- a/Sources/Bluetooth/UInt40.swift
+++ b/Sources/Bluetooth/UInt40.swift
@@ -10,7 +10,7 @@ import Foundation
 
 /// A 40 bit number stored according to host endianness.
 @frozen
-public struct UInt40: ByteValue {
+public struct UInt40: ByteValue, Sendable {
     
     public typealias ByteValue = (UInt8, UInt8, UInt8, UInt8, UInt8)
     
diff --git a/Sources/Bluetooth/UInt48.swift b/Sources/Bluetooth/UInt48.swift
index e1178685b..b698c0f41 100644
--- a/Sources/Bluetooth/UInt48.swift
+++ b/Sources/Bluetooth/UInt48.swift
@@ -9,7 +9,7 @@
 import Foundation
 
 @frozen
-public struct UInt48: ByteValue {
+public struct UInt48: ByteValue, Sendable {
  
     public typealias ByteValue = (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)
     
diff --git a/Sources/Bluetooth/UInt512.swift b/Sources/Bluetooth/UInt512.swift
index dba37d9f3..e1d960286 100644
--- a/Sources/Bluetooth/UInt512.swift
+++ b/Sources/Bluetooth/UInt512.swift
@@ -10,7 +10,7 @@ import Foundation
 
 /// A 512 bit number stored according to host endianness.
 @frozen
-public struct UInt512: ByteValue {
+public struct UInt512: ByteValue, Sendable {
     
     public typealias ByteValue = (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)
     
diff --git a/Sources/Bluetooth/UnitIdentifier.swift b/Sources/Bluetooth/UnitIdentifier.swift
index 738a1b0b6..b2f4c7af9 100644
--- a/Sources/Bluetooth/UnitIdentifier.swift
+++ b/Sources/Bluetooth/UnitIdentifier.swift
@@ -9,12 +9,11 @@
 import Foundation
 
 @frozen
-public struct UnitIdentifier: RawRepresentable, Equatable, Hashable {
+public struct UnitIdentifier: RawRepresentable, Equatable, Hashable, Sendable {
     
     public var rawValue: UInt16
     
     public init(rawValue: UInt16) {
-        
         self.rawValue = rawValue
     }
 }
@@ -24,7 +23,6 @@ public struct UnitIdentifier: RawRepresentable, Equatable, Hashable {
 extension UnitIdentifier: ExpressibleByIntegerLiteral {
     
     public init(integerLiteral value: UInt16) {
-        
         self.init(rawValue: value)
     }
 }
diff --git a/Sources/Bluetooth/iBeacon.swift b/Sources/Bluetooth/iBeacon.swift
index fe1613905..8b9b67386 100644
--- a/Sources/Bluetooth/iBeacon.swift
+++ b/Sources/Bluetooth/iBeacon.swift
@@ -18,7 +18,7 @@ import Foundation
  - SeeAlso: [Getting Started with iBeacon](https://developer.apple.com/ibeacon/Getting-Started-with-iBeacon.pdf).
  */
 @frozen
-public struct AppleBeacon: Equatable, Hashable {
+public struct AppleBeacon: Equatable, Hashable, Sendable {
     
     #if !os(WASI)
     /// The company that created this specification.