The audio adapter is convenient and practical, with excellent texture, and can serve you for a long time without being easily . The craftsmanship can serve you well without breaking easily. This is a very practical audio adapter. Features -Color: Black -Material: ABS, electronic components -Size: 6.50X4.50X1.80cm/2.55X1.77X0.71in Version: 5.0 Operating Range: Up to 10m / 33ft (without any objects) Charging time: 2 hours Working hours: 12 hours Battery Type: 400mAh - In receiving mode, this product supports hands-free calling. When the phone calls, short press the key to . - The transmit mode can be used on sound source devices that do not support , such as computers and TVs, to help these devices transmit sound to speakers, headsets, etc. - Transmitting mode will automatically search for other receiving devices (such as earphones, speakers, receivers, etc.). - 5.0 technical standard, barrier free transmission distance is up to 10 meters. - workmanship, reasonable structure, professional and practical, can bring you convenience. Package list: 1 x adapter 1 x micro USB cable 1 x 3.5mm to cable 1 x 3.5mm to 3.5mm cable