1. Bluetooth 5.0 Technology: The Receiver Audio Is Equipped With Bluetooth 5.0 Chip, Which Can The High-Fidelity Transmission Of Bluetooth Audio Signal In Order To Music To Speakers Or Non-Functional Home Audio . 2. High-Definition Bluetooth Audio: Bluetooth Audio Adapter Transmission Supports The Transmission Of High-Resolution Audio (Higher Than And Hd) At A Speed Of Up To 990kbps Through Bluetooth Connection, Thereby Greatly Reducing The Loss Of Sound Quality Caused By Bluetooth Transmission. 3. Bring Wireless Bluetooth To Audio: Bluetooth Adapter Can Connect To Vintage Non-Bluetooth Receiver, Wired Retro Audio, Speaker, Wired Headphones, Car Stereo Through 3.5mm Aux/Rac , Give Old Devices A Note: This Product Is A Receiver Only, Not A Transmitter. 4.3d Surround Sound Feature: Features A 3d Button Design That Has A Captivating Sound Experience With Deep Dynamic Bass. You Can Switch 3d Mode And Enjoy 3d Surround Sound From Regular Audio Sources. When Switching To 3d Audio, The Green Led Will . 5. Simple Pairing Connection: Connect The Power Supply Directly Into The Pairing Mode, Turn On The Bluetooth Of The Smartphone, And You Can Connect. Continuous Playback: 12h (Max) Receiving Distance: 12m (Max) Indoors 1. Bluetooth Scheme: 5.0 , A2DP, , AVRCP 2. Frequency: 2.4GHz-2.48GHz 3. Bluetooth Receiving Distance less than 10 Meters 4. Charging Voltage: DC 5V 5. Material: ABS 6.Size:7cm x 7cm x 3.45cm Colour:black Package Contents: 1 x 1 x Aux Audio Cable 1 x Rca Audio Cable 1 x Type-C Power Cord 1 x English Manual 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.