With the built-in large capacity battery, it has a long battery life. With one for two function, you can share music to your friends since two wireless headsets are connected at the same time.Built-in enhanced signal transmission circuit makes connection faster and more stable.It is made of good quality ABS material, durable to use.The length of this product is 6.4cm, the width is 4.7cm and the height is 1.4cm.It is suitable for car, headphone, TV, computer, etc.Item Name: Bluetooth-compatible AdapterMaterial: ABSColor: BlackOutput Interface: 3.5mm AudioBluetooth-compatible Version: V5.0 EDR, A2DP, HSP, AVRCPTransmission Distance: 10 MetersInterface: 3.5mmTransmission Rate: 1000 (Mbps)Battery: 300mAh (Included)Features: Portable, Stable Transmission, Good Sound QualitySize Details: 6.4cm x 4.7cm x 1.4cm/2.52" x 1.85" x 0.55" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bluetooth-compatible Adapter