Convoy&reg; Bluetooth Transmitter, Wireless Portable Transmitter for Home Audio Music Streaming Sound System with 3.5 Mm Stereo Output for TV PC Audio Devices Connect to Bluetooth Devices, Black High Efficiency: Turn your regular stereo audio devices into a Bluetooth-enabled,wireless streaming machine thru 3.5mm audio-out jack. Works for 6~8 hours after full charge Built-in 4.0 Bluetooth: High performance Bluetooth 4.0 with A2DP for enhanced audio quality, allows you to enjoy the stereo music without wire restriction or watch TV quietly. Multifunctional: wireless function works for TV, PC, MP3 Player, DVD player and other Bluetooth-disabled audio devices. Simple and Small: Lightweight and durable, high-quality, simple steps to use, no complex setting. Cyclic Utilization: Eco-friendly design, the transimitter includes a rechargeable battery which save energy at the same time.