Description: Feature: 1.Adopt Bluetooth-compatible 5.0 chip. 2.Built-in 300 mAh polymer battery, continuous listening to songs for about 6 hours. 3.Receiver Mode: Change the traditional Car Stereo system or Home Audio System into Bluetooth-enabled ones. After paired, for play music wirelessly from your Bluetooth-enabled for Smart Phones, Laptop, Tablet and more. 4.Transmitter Mode: Can be connected to the audio devices (such as MP3, MP4, TV and PC, etc.) without Bluetooth-compatible function, changing them into BT-enabled ones, and making it work with Bluetooth-enabled Headset and Speaker. 5. Bluetooth-compatible transmission function: can simultaneously connect 2 pairs of Bluetooth-compatible headsets or Bluetooth-compatible speakers Bluetooth-compatible receiving function: connect 1 mobile phone. 6.Press and hold the multi-function button to switch on and off. In receiving mode, when there is a call, press the button to answer the call hands-free. Specification: Product type: Bluetooth-compatible Adapter Material: ABS Colour: Black Dimensions: 47.9x65.9x13.3mm Transmission signal distance: 10m Input interface: 3.5mm Input voltage: for DC 5V Internal battery: 300mAh Working time: about 6 hours Bluetooth-compatible configuration files: 5.0 EDR, A2DP, HSP, AVRCP Quantity: 1 note: Transition: 1cm = 10mm = 0.39inch Due to manual measurement, please allow 1-3mm error. Please make sure you do n'for t mind before bidding. Due to the differences between different monitors, the picture may not reflect the actual color of the project. Thank you! The package includes: 1x Bluetooth-compatible Adapter 1 x 3.5mm Cable 1 x Charging Cable 1 x Instruction Manual