Descriptions: The Bluetooth Transmitter is specially designed for the Audio Devices (such as MP3, MP4, TV, PC and DVD, etc.) without Bluetooth function. After connected with them via 3.5mm audio cable or RCA cable, it can transmit the audio files of them to the Bluetooth-enabled Receiver devices (such as, Headset, Speaker, Bluetooth Receiver, etc.). Features: Wireless 4.0 technology ensures transmitting strong signal in high quality and high speed. Transmission distance is up to 10m / 33ft, free to enjoy wireless music. BT Audio Transmitter: Can be connected to the audio devices (such as MP3, MP4, TV and PC, etc.) without Bluetooth function, changing them into BT-enabled ones, and making it work with BT-enabled Headset and Speaker. Powered By USB: With USB plug, you can plug and play this transmitter easily and no need any other driver software, powered by USB, there is also no time limited. Perfect Sound Effect: Adopts Advanced Bluetooth Module which lets it get high-quality sound effect with A2DP. You can enjoy music, watch movies and play games without disturbing others. Mini and Portable: Delicate and high-end glossy appearance design, mini and light-weight, very easy to carry and custody. Bluetooth Version: 4.0 Transmission Distance: up to 10m (no obstacle) Color: Black Main Item Size: 6.6 * 2.7 * 0.9cm / 2.59 * 1.06 * 0.35in Package List: 1 * Bluetooth Transmitter 1 * 3.5mm Audio Cable