Brand N/A Model 838 Quantity 1 Color Black + blue Bluetooth Version Bluetooth v3.0 + EDR Ear Coupling Headband Talk Time 10 Hour Standby Time 200 Hour Operating Range 5~8 meter Compatibility Compatible with Bluetooth V2.1 / V2.0 / V1.1 Microphone Yes Radio N/A Supports Music Format MP3 / WAV / WMA Power Supply Built-in Battery Built-in Battery Capacity 430mAh Compatible With Cell phone and tablet PC with Bluetooth function BQB Certification No Other Features Interface: TF card slot / mini USB / 3.5mm jack; Stereo sound performance; Supports HSP / HFP / A2DP / AVRCP; Frequency: 2.400~2.480GHz; Supports TF card up to 32GB; Charging time: 3~4 hours. Packing List 1 x Bluetooth headphones 1 x USB charging cable (82cm)