Features: 1. Type-C 5V Power Supply, Built-In Common Ground Interference Processing Circuit To Ensure Stable Sound Output 2. Upgrade The Bluetooth Speaker, The Speaker Without Bluetooth Function Can Also Achieve The Effect Of Wireless Playback 3. Upgrade The Bluetooth Power Amplifier, Connect The Power Amplifier With Rca Interface, Make Use Of Equipment, And Enjoy High-Quality Music 4. Upgrade The Car Bluetooth Speaker, Plug It Into The Car Aux Port, Use The Mobile Phone Bluetooth Connection To Listen To Music Wirelessly, And Let The Car Audio Cheer Up 5. Bluetooth 5.3, No Freeze When Listening To Music, Professional Audio Dsp Chip Description: 1. Input Voltage: DC 5V 2. Product Name: Bluetooth Audio Receiver 3. Interface Type: Aux+Rca 4. Bluetooth Version: Bluetooth V5.3 5. Product Size: 8.3 x 5.6 x 2.5cm 6. Bluetooth Protocol: A2DP AVRCP 7. Transmission Distance: 10m Without Obstacles 8. Music Format: MP3/APE/FLAC/WAV/WMA 9.Color: Black 10.Material: ABS Package Contents: 2 x Receiver 2 x Chinese And English Manual 2 x Type-C Power Supply Cable 2 x AUX Audio Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.