Brand N/A Model AY- 668 Quantity 1 Color Black Bluetooth Version V2.1 + EDR Ear Coupling Over the Ear Talk Time 8~12 Hour Standby Time 120~300 Hour Operating Range 10 meter Compatibility V2.1 + EDR or the version below V2.1 + EDR Microphone Yes Power Supply Built-in Battery Built-in Battery Capacity 150mAh Compatible With The devices with Bluetooth V2.1 + EDR or the version below V2.1 + EDR BQB Certification No Other Features Frequency: 2402~2480MHz; Frequency response: 20Hz~20KHz; Music playing time: 12 hours; Charging time: 3 hours; Fashionable design high quality Packing List 1 x Headset 1 x USB cable (72.5cm) 1 x Chinese / English user manual