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) Indoors1. Bluetooth Scheme: 5.0 , A2DP, , AVRCP2. Frequency: 2.4GHz-2.48GHz3. Bluetooth Receiving Distance less than 10 Meters4. Charging Voltage: DC 5V5. Material: ABS6.Size:7cm x 7cm x 3.45cmColour:blackPackage Contents:1 x 1 x Aux Audio Cable1 x Rca Audio Cable1 x Type-C Power Cord1 x English ManualOnly 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.