Model X-M13 Quantity 1 Color Black Bluetooth Version Bluetooth v2.1 Ear Coupling Headband Talk Time 10 Hour Standby Time 100 Hour Operating Range Max 10 meter Compatibility Compatible with Bluetooth v2.0 / v2.1 Microphone Yes Radio N/A Supports Music Format N/A Power Supply Built-in Battery Built-in Battery Capacity 180mAh Compatible With Iphone 4 / 4S Other Features It can redial the last telephone number refuse answering sound adjustable etc functions; Suitable for most of Bluetooth cell phones; Can chat online use with a Bluetooth wireless transmitter (not included) Packing List 1 x Bluetooth headphone 1 x USB charging cable (100cm) 1 x English user manual