• Supports multiple devices, wirelessly connecting amplifier/car audio with mobile phones, tablets, and laptops
• Upgrade regular audio to Bluetooth-compatible audio, use an adapter to receive high-definition sound without stuttering (supports various old-fashioned audio with USB input, active audio)
• Old style amplifier plugged into USB interface, allowing for high-quality music playback on your phone, freeing up wired constraints and allowing for more freedom in listening to music
• Connect the Bluetooth-compatible receiver to the car USB interface, and you can make calls and listen to music through Bluetooth-compatible connection

Specifications:

• Bluetooth-compatible version: 5.3
• Transmission distance: 10 meters
• Scope of application: speaker/amplifier/car audio
• Voice call: support