Features: Easy to Use: Simply connect your speaker to our device and instantly turn your speaker into a stylish wireless Bluetooth-Compatible speaker. High-Fidelity Music: It will give you high-grade sound and you can enjoy streaming music in your car home or wherever you like. No Batteries Needed: This car Bluetooth-Compatible adapter is very small and simple and also easy to use no batteries needed USB port to plug in and power up unplug and power down. Wide Applications: It can be used for home theater mobile phone karaoke machine speaker stage and so on. This is a great gift for you and your friends. Service: With customer satisfaction as our first priority we offer a satisfaction service for all of our merchandise. If you have any problems please contact us in time. We will give you replies as soon as possible. Specification: Type: Reusable Product Size: 55*20*10mm Version: Bluetooth-compatible 2.1+EDR specification Charging: USB Recieve Distance: 10m Notes: 1. Due to the lighting effects and shooting angles there is a color difference in the product please understand. 2. Due to manual measurement there is a tolerance in the product size. includes: 1 *USB Bluetooth-Compatible Receiver 1 * Cable "