The USB Bluetooth Receiver is specially designed for Car Stereo systems and Home Audio System. And， it can change the traditional Speaker， Car Stereo systems and Home Audio System into Bluetooth-enabled ones， and easy to pair with Bluetooth-enabled Smart Phones， laptop， tablet， etc. With this product， you can greatly enjoy wireless music from your Smart Phone， Computer， Laptop & MP3 without the hassle of cables. It is perfectly suitable for the car owners. Features:Magical Function: The Bluetooth Receiver Change the traditional Speakers into Bluetooth-enabled ones. After paired， play music wirelessly from your Bluetooth-enabled Smart Phones， Laptop， Tablet， etc. Great Hardware: Bluetooth 2.1 + EDR ensure stable signal and super-fast data transmission. Compatible with Most Speakers: Connect the Bluetooth Receiver with any Audio Input Devices， Stereo System (Car Stereo Systems， Home Audio System) & Speaker through 3.5mm audio jack. Support Noise Suppression and Echo Cancellation， offering you Magnificent Stereo Sound & Wonderful Sound Quality. Compatible with Lossless Audio Format; Support 3.5mm Audio Output. Superior wireless performance; Transmit up to 30 feet away with line of sight.Perfectly Compatibility: For iOS / Android Smart Phones， PAD and other Bluetooth-enabled Devices.Specifications:Bluetooth Version: Bluetooth 2.1 + EDR， Class 2. Bluetooth Operating Distance: > 10mOutput Connection Way: 3.5mm Stereo Interface. Color: BlackItem Size: 3.5 * 3.0 * 1.0cm / 1.37 * 1.18 * 0.39inItem Weight: 7g / 0.26ozPackage size: 12.5 * 7.5 * 1.5cm / 4.9 * 2.8 * 0.79inPackage weight: 16g / 0.59ozPackage List:1 * USB Bluetooth Receiver1 * English / Chinese User Manual