Features 1、Using advanced technology to build the system, support tens of millions of users concurrent, stable system, fast speed. 2、The computer sound card function can output better signal than the computer sound quality to receive the speaker playback. 3、Battery power supply, charge management, one‑button switch machine, automatic back connection, stereo output, nondestructive decoding. 4、Support usb flash drive to play. For Bluetooth version of 5.0, reliable in use. 5、5V Power supply, stable and excellent performance, convenient to use. Specification Condition: 100% Brand New Item Type: Audio Receiver Module Material: Plastic Power supply: 5V Purpose: DIY for Bluetooth APP Download Address: For IOS: Go to the Application Store and search: Xin Yi Lian or Sinilink For android: https://m.pp.cn/detail.html?Ch_src = pp_dev & appid = 7921907 & ch = default or enter the website to download: http://www.sinilink.com/release.apk Or mobile phone APP download: PP assistant. Search "Xinyilian" to download or scan the codes to download the APP in PP Assistant Package List 1 x Audio Receiver Module