diff --git a/index.js b/index.js
index 20848d7..72bc41a 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,8 @@
 import { default as Usbmux } from './lib/usbmux';
 import * as utilities from './lib/utilities';
 import * as services from './lib/services';
+import { INSTRUMENT_CHANNEL } from './lib/instrument';
 
 
-export { Usbmux, utilities, services };
+export { Usbmux, utilities, services, INSTRUMENT_CHANNEL };
 export default Usbmux;
diff --git a/lib/instrument/index.js b/lib/instrument/index.js
index 1735b3c..35537ee 100644
--- a/lib/instrument/index.js
+++ b/lib/instrument/index.js
@@ -17,7 +17,7 @@ const CHANNEL_OFFSET = 2 ** 32;
 const INSTRUMENT_SERVICE_NAME_VERSION_14 = 'com.apple.instruments.remoteserver.DVTSecureSocketProxy';
 const INSTRUMENT_SERVICE_NAME = 'com.apple.instruments.remoteserver';
 
-export const SERVICE = Object.freeze({
+export const INSTRUMENT_CHANNEL = Object.freeze({
   DEVICE_INFO: 'com.apple.instruments.server.services.deviceinfo',
   PROCESS_CONTROL: 'com.apple.instruments.server.services.processcontrol',
   SYSMONTAP: 'com.apple.instruments.server.services.sysmontap',
@@ -84,9 +84,9 @@ class InstrumentService extends BaseServiceSocket {
   }
 
   /**
-   * If the event is registered, this channel {SERVICE} messages will be returned to event. refer to this._handleData
+   * If the event is registered, this channel {CHANNEL} messages will be returned to event. refer to this._handleData
    * It's actually listening for int channelCode. In this._channel object to record channel key and int value
-   * @param {string} channel instruments service channel e.g: SERVICE.DEVICE_INFO.
+   * @param {string} channel instruments service channel e.g: INSTRUMENT_CHANNEL.DEVICE_INFO.
    * @param {DTXCallback} event
    */
   async registerChannelCallback (channel, event) {
@@ -96,7 +96,7 @@ class InstrumentService extends BaseServiceSocket {
 
   /**
    * Create a service channel, data transmission of the service will use this channelCode
-   * @param {string} channel  instruments service channel e.g: SERVICE.DEVICE_INFO
+   * @param {string} channel  instruments service channel e.g: INSTRUMENT_CHANNEL.DEVICE_INFO
    * @returns {Promise<number|*>} instruments service channel code for data transmission
    */
   async makeChannel (channel) {
@@ -111,12 +111,12 @@ class InstrumentService extends BaseServiceSocket {
 
   /**
    * In general, we call this method to start the instrument dtx service
-   * @param {string} channel instrument dtx service e.g: SERVICE.DEVICE_INFO
+   * @param {string} channel instrument dtx service e.g: INSTRUMENT_CHANNEL.DEVICE_INFO
    * @param {string} selector instrument service method name (reflection calls)
    * @param {...any} auxiliaries parameters required by selector
    * @returns {Promise<DTXMessage>}
    * example：
-   * instrumentService.callChannel(SERVICE.PROCESS_CONTROL,
+   * instrumentService.callChannel(INSTRUMENT_CHANNEL.PROCESS_CONTROL,
         'launchSuspendedProcessWithDevicePath:bundleIdentifier:environment:arguments:options:', '',
         bundleID, {}, [], {'StartSuspendedKey': 0, 'KillExisting': 1}
    */
diff --git a/test/instrument/instrument-service-specs.js b/test/instrument/instrument-service-specs.js
index a7c39c8..55da25c 100644
--- a/test/instrument/instrument-service-specs.js
+++ b/test/instrument/instrument-service-specs.js
@@ -1,5 +1,5 @@
 import chai from 'chai';
-import {InstrumentService, SERVICE} from '../../lib/instrument';
+import {InstrumentService, INSTRUMENT_CHANNEL} from '../../lib/instrument';
 import { getServerWithFixtures, fixtures } from '../fixtures';
 import B from 'bluebird';
 
@@ -25,7 +25,7 @@ describe('instrument', function () {
     ({server, socket} = await getServerWithFixtures(fixtures.INSTRUMENTS_LAUNCH_APP));
     const bundleID = 'com.apple.mobilesafari';
     instrumentService = new InstrumentService(socket);
-    const data = await instrumentService.callChannel(SERVICE.PROCESS_CONTROL,
+    const data = await instrumentService.callChannel(INSTRUMENT_CHANNEL.PROCESS_CONTROL,
         'launchSuspendedProcessWithDevicePath:bundleIdentifier:environment:arguments:options:', '',
         bundleID, {}, [], {'StartSuspendedKey': 0, 'KillExisting': 1});
     data.selector.should.be.equal(pid);
@@ -34,7 +34,7 @@ describe('instrument', function () {
   it('should ios device kill app ', async function () {
     ({server, socket} = await getServerWithFixtures(fixtures.INSTRUMENTS_LAUNCH_APP));
     instrumentService = new InstrumentService(socket);
-    await instrumentService.callChannel(SERVICE.PROCESS_CONTROL, 'killPid:', pid.toString());
+    await instrumentService.callChannel(INSTRUMENT_CHANNEL.PROCESS_CONTROL, 'killPid:', pid.toString());
   });
 
   it('should ios device get fps', async function () {
@@ -46,7 +46,7 @@ describe('instrument', function () {
     }
     instrumentService = new InstrumentService(socket, message);
     const data = [];
-    await instrumentService.callChannel(SERVICE.GRAPHICS_OPENGL, 'startSamplingAtTimeInterval:', 0);
+    await instrumentService.callChannel(INSTRUMENT_CHANNEL.GRAPHICS_OPENGL, 'startSamplingAtTimeInterval:', 0);
     await new B((resolve) => {
       setTimeout(() => {
         resolve(data);