Docooler&reg; USB Bluetooth Audio Transmitter Wireless Stereo Bluetooth Music Box Dongle Adapter for TV MP3 PC Black TS-BT35F05 Connect to the Audio Devices without Bluetooth function via 3.5mm audio plug, make it able to work with Bluetooth A2DP headset / speaker. Effective range, 10m / 33ft (Depending on specific circumstance and the transmitter device). Standard 3.5mm audio socket enables to connect to MP3, MP4, TV and most modern audio device. USB plug for getting power. Plug and play, no need installation. Compact size, portable and lightweight, very easy to carry and custody.