Earphone Type: Bluetooth HeadsetBluetooth Version: V3.0+EDRBluetooth Profile: Hands Free/HeadsetFrequency Range: 2.4GHzTransmission Distance: Up to 10MTransmitting Power: Class 2Input:AC 110-240VOutput: DC 5VTalking Time: Up to 2 hoursStandby Time: Up to 70 hoursSize: 18*18*22 mm Package included:1 x Bluetooth headset1 x USB cable1 x Instructions manualplease follow the steps before use it:1: please press the power button for about 5 seconds until you see blue-red light blinking alternately (each light last for 1 second.) In this mode、 it is for device pairing2: please enable the cell phone's bluetooth function 、 then find the bluetooth device "R6250" 、just click :R6250 and connect it is ok3: When you receive a call 、 just need to click the power button of the bluetooth headset R6250