diff --git a/README.md b/README.md
index 04e70e7..1f37a4c 100644
--- a/README.md
+++ b/README.md
@@ -40,3 +40,4 @@ Check your [browser and platform implementation status](https://github.com/WebBl
 - [BLE Keyboard & Mouse Dongle](https://github.com/DeqingSun/BLE-Keyboard-Mouse-Dongle) by [@DeqingSun](https://github.com/DeqingSun)
 - [Connect to the Myo armband](https://github.com/charliegerard/myo-web-bluetooth.js) by [@charliegerard](https://github.com/charliegerard)
 - [Mercedes-Benz car emulator demo](https://www.youtube.com/watch?v=97MlLkfLVf0) by [Mercedes-Benz Digital Challenge](http://www.mercedes-benz-challenge.com/)
+try the api to print when using Thermal Mini Printer
diff --git a/bluetooth-printer/index.html b/bluetooth-printer/index.html
index cb74d82..2ff4e6a 100644
--- a/bluetooth-printer/index.html
+++ b/bluetooth-printer/index.html
@@ -248,7 +248,7 @@ <h2>Error</h2>
           if (printCharacteristic == null) {
             navigator.bluetooth.requestDevice({
               filters: [{
-                services: ['000018f0-0000-1000-8000-00805f9b34fb']
+                services: ['0xffe5]
               }]
             })
             .then(device => {
@@ -256,8 +256,8 @@ <h2>Error</h2>
               console.log('Connecting to GATT Server...');
               return device.gatt.connect();
             })
-            .then(server => server.getPrimaryService("000018f0-0000-1000-8000-00805f9b34fb"))
-            .then(service => service.getCharacteristic("00002af1-0000-1000-8000-00805f9b34fb"))
+            .then(server => server.getPrimaryService("0xffe5"))
+            .then(service => service.getCharacteristic("0xffe9"))
             .then(characteristic => {
               // Cache the characteristic
               printCharacteristic = characteristic;