Brand N/A Model Link-381 Quantity 1 Color Black Bluetooth Version V3.0 Operating Range 10 meter Compatibility No Microphone Yes Radio N/A Supports Music Format N/A Power Supply Built-in Battery Built-in Battery Capacity 250mAh Compatible With Supports Bluetooth cellphone Bluetooth laptop / notebook / tablet PC Iphone Ipad MID and other devices with Blueooth Certification CE / FCC Other Features Interface: Mini USB 3.5mm jack; Supports A2DP V1.2; Supports class 2 / Class 1; Powered by DC 5V; Transmission distance is not less than 10 meters; 1 connecting indicating light blue light quick flashing as no connection slow flashing as connecting; 3 x function keys 1 x standard microphone 1 x 3.5mm jack 1 x Mini USB charging port; Built-in lithium battery (250mAh); EFC function is optional Packing List 1 x Bluetooth receiver 1 x USB cable (80cm)1 x Audio cable (150cm)1 x English user manual