Product Description: Interface 3.5mm USB Whether plug and play plug and play External power supply No external power supply Transfer rate 4 (Mbps) Effective working radius 10 (m) Bluetooth standard 5.0 Working frequency 2480 (MHz) describe: Bluetooth version 5.0. The latest Bluetooth 5.0+EDR, Bluetooth 5.0 chip for stable and reliable streaming, ensures the Bluetooth audio signal in the high-fidelity music stream to those speakers or home audio systems thatdo not have this feature. The Bluetooth transceiver with low latency and high stability adopts 5.0 technology, which offers more stable, faster transmission, lower power consumption while maintaining excellent sound quality. Bluetooth 5.0 isEquipped with an audio adapter, the data transfer rate is twice that of Bluetooth 4.2 and the distance can be maintained up to 15 meters (no barriers). LONG WORKING TIME: The bluetooth adapter has a memory function and will automatically connect to the devices you have paired before turning on. Built-in rechargeable battery, more convenient to use anytime, anywhere,the working time is about 10 hours and you only need to charge it for 2 hours. Plug and play, no need to drive or download apps. Just plug the Bluetooth receiver into the auxiliary port, turn on Bluetooth on your phone, connect and play. Easy to pair and useCompatible with 99.9% of Bluetooth devices. Strong compatibility, supports all audio devices with audio input interface for wireless audio reception and transmission. Compatible with almost all Bluetooth-enabled audio devices and a 3.5mm stereo jack for Android and iOS, smartphonesand tablets.