Features: 1. Bluetooth Reception & Digital-To-Analog Conversion U Disk To Play Three-In-One, Bluetooth, Coaxial, Optical Fiber, U Disk, Aux 2. New Experience, Open Up Smart Life 3. Multi-Device Expansion, Bluetooth Receiving Mode & Optical Fiber Coaxial Digital-To-Analog Conversion 4. Wired Seconds To Wireless, Let Your Speaker Upgrade Bluetooth Speaker 5. 20m -Free Transmission, Stable Signal, Low Latency Description: Bluetooth Version: 5.0 Model: D18 Mode: Coaxial/Optical Fiber/U Disk Bluetooth Power Input: 5v Size: 5.9 x 7.1 x 2.5cm Interface: Aux Usb Coaxial Toslink Transfer Rate: 2500 (Mbps) Working Frequency: 2400(Mhz) Effective Working Radius: 20(M) Material: Plastic colour: As shown Package Contents: 1 x Receiver 1 x Remote Control 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.