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: Material: Plastic metal Interface:USB Transmission rate:300Mbps Effective working radius:10m includes: 1 *USB Bluetooth-Compatible Receiver