Features: brand new and high quality Receive: The adapter can receive Bluetooth-Compatible audio signal from mobile phone and other devices, and then output audio signal through AUX / RAC mode. Transmit: The adapter can use 3.5mm AUX cable as audio input. The adapter transmits audio signal to paired headset or bluetooth-Compatible speaker play music through bluetooth. (Note: At the same time, only one device can be paired at the same time.) The adapter uses an excellent encoding/decoding audio chip. It provides a HiFi quality music experience. The entire adapter has strong processing capabilities and can achieve zero delay. Insert TF card or U-Disk into the adapter. The adapter can automatically play music in TF card, and support mp3/WAV/FALC/APE format. Support Devices: All kinds of speakers/Desktop computer/Laptop/TV/Power amplifier/Projector. Specifications: Interface: 3.5mm audio plus optical fiber Transmission rate: 180 (Mbps) Effective working radius: 10 (m) Bluetooth-compatible standard: 5.1 Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Bluetooth-compatible 5.1 Audio Receiver