diff --git a/browser/src/libs/device/index.ts b/browser/src/libs/device/index.ts
index 5d7e4f3..a7d2a62 100644
--- a/browser/src/libs/device/index.ts
+++ b/browser/src/libs/device/index.ts
@@ -1,8 +1,8 @@
 import { Modifiers } from './keyboard.ts';
 import { Key as MouseKey, Mode as MouseMode } from './mouse.ts';
-import { CmdEvent, CmdPacket } from './proto.ts';
+import { CmdEvent, CmdPacket, InfoPacket } from './proto.ts';
 import { SerialPort } from './serial-port.ts';
-import { intToLittleEndianList } from './utils.ts';
+import { intToByte, intToLittleEndianList } from './utils.ts';
 
 export class Device {
   addr: number;
@@ -13,6 +13,15 @@ export class Device {
     this.serialPort = new SerialPort();
   }
 
+  async getInfo() {
+    const data = new CmdPacket(this.addr, CmdEvent.GET_INFO).encode();
+    await this.serialPort.write(data);
+
+    const rsp = await this.serialPort.read(14);
+    const rspPacket = new CmdPacket(-1, -1, rsp);
+    return new InfoPacket(rspPacket.DATA);
+  }
+
   async sendKeyboardData(modifiers: Modifiers, keys: number[]) {
     if (keys.length !== 6) {
       throw new Error('keyboard keys length must be 6');
@@ -47,13 +56,6 @@ export class Device {
   }
 
   async sendMouseRelativeData(msKey: MouseKey, x: number, y: number, scroll: number) {
-    function intToByte(value: number): number {
-      if (value < -128 || value > 127) {
-        throw new Error('value must be in range -128 to 127 for a signed byte');
-      }
-      return (value + 256) % 256;
-    }
-
     const xByte = intToByte(x);
     const yByte = intToByte(y);
 
diff --git a/browser/src/libs/device/proto.ts b/browser/src/libs/device/proto.ts
index 8170317..c6fa872 100644
--- a/browser/src/libs/device/proto.ts
+++ b/browser/src/libs/device/proto.ts
@@ -1,3 +1,5 @@
+import { getBit } from './utils.ts';
+
 export enum CmdEvent {
   GET_INFO = 0x01,
   SEND_KB_GENERAL_DATA = 0x02,
@@ -106,3 +108,27 @@ export class CmdPacket {
     this.SUM &= 0xff;
   }
 }
+
+export class InfoPacket {
+  CHIP_VERSION: string = 'V0.0';
+  IS_CONNECTED: boolean = false;
+  NUM_LOCK: boolean = false;
+  CAPS_LOCK: boolean = false;
+  SCROLL_LOCK: boolean = false;
+
+  constructor(data: number[]) {
+    if (data[0] < 0x30) {
+      throw new Error('version error');
+    }
+
+    const versionE = data[0] - 0x30;
+    const version = 1.0 + versionE / 10;
+    this.CHIP_VERSION = `V${version.toFixed(1)}`;
+
+    this.IS_CONNECTED = data[1] !== 0;
+
+    this.NUM_LOCK = getBit(data[2], 0) === 1;
+    this.CAPS_LOCK = getBit(data[2], 1) === 1;
+    this.SCROLL_LOCK = getBit(data[2], 2) === 1;
+  }
+}
diff --git a/browser/src/libs/device/utils.ts b/browser/src/libs/device/utils.ts
index 06d7b5e..96eebec 100644
--- a/browser/src/libs/device/utils.ts
+++ b/browser/src/libs/device/utils.ts
@@ -10,6 +10,13 @@ export function setBit(number: number, bitPosition: number, value: boolean): num
   }
 }
 
+export function intToByte(value: number): number {
+  if (value < -128 || value > 127) {
+    throw new Error('value must be in range -128 to 127 for a signed byte');
+  }
+  return (value + 256) % 256;
+}
+
 export function intToLittleEndianList(number: number): number[] {
   const byteList: number[] = [];
   for (let i = 0; i < 2; i++) {