1. Plug and Play: The Bluetooth chip uses a USB direct power supply, no charging is required, and this adapter can be used with a direct power supply from the speaker USB port. 2. For Most Systems: The Bluetooth receiver has no requirements for the system, which is suitable for speakers, cars, and power amplifiers. 3. Fast and Stable: The adapter features Bluetooth 5.0. Operation range about up to 10 m (about 33 ft), which is faster and more stable than that features the Bluetooth 4.0 version transmission. 4. Receiving Function: The receiving function of the Bluetooth adapter turns ordinary speakers into Bluetooth speakers, let the car without Bluetooth have the Bluetooth function, so you can easily listen to music, make calls, use the mobile phone navigation and broadcast in the car. And the Bluetooth adapter can let the amplifier have the Bluetooth function, it supports multiple audio mode playback. 5. USB/AUX Output Modes: This Bluetooth adapter support audio equipment with a USB port and a 3.5mm (AUX) jack, which is perfect for the car, speaker and amplifier, etc. Model: MSD169 Technologies: BT 5.0, A2DP, AVRCP Operation range: about Up to 10 m / 33 ft (without any blocking objects) Audio interface: USB & AUX type: Bluetooth 5.0 Audio Receiver color:Black Material:ABS size:34 x 19 x 12mm Package Contents: 1 x Bluetooth 5.0 Audio Receiver 1 x 3.5 mm Aux Cable