This back clip barcode scanner offers a convenient solution for barcode scanning and data collection on for iOS or for Android mobile phones. Bluetooth Connection:With Bluetooth, you can connect with your phone, , tablet, computer. Compatible with , for OS, Linux, for Android, for IOS. Although this scanner is phone back clip design, you can also use it as a bluetooth scanner alone as a normal Bluetooth barcode scanner. Design with 2 scanning button, to achieve left and right positions to scan, making you more easily to choose a more comfortable scanning way. HOW TO USE THE SCANNER WITH YOUR PHONE?1. and hold the small round orange dot button on the back for about 5 seconds to enter the Bluetooth pairing state. 2.When enter the Bluetooth pairing state, you see the blue light is flash(A light with a Bluetooth ). 3.Navigate to your phone's Settings, Under Settings, find the Bluetooth option and make sure it is set to "On" 4.Once Bluetooth is enabled, select your scanner named "Barcode Scanner HID" from the list of available devices. Colour:Black Material:plastic Package Contents: 1 x Bluetooth Barcode Scanner Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.