Brand N/A Model N/A Quantity 1 Color Black+Silver Bluetooth Version V2.1 Ear Coupling Behind the Neck Talk Time up to 4-8hours Hour Standby Time 120 Hour Operating Range 10 meter Compatibility V4.0 and bellow V4.0 Microphone Yes Built-in Battery Capacity 100mAh Compatible With specification V4.0 and bellow V4.0 BQB Certification No Other Features IOS power display; Smart voice caller ID; Music/call switching. freely and relaxed; Two-link can connect two bluetooth devices at the same time Packing List 1 x Bluetooth Stereo Headphone 1 x USB charger(length:76cm) 1 x Single headphones(60cm)