Aizbo Portabfor All 3.5mm Audio-in Speaker Device Systems Such as Portable Speakers, Headphones, Home stereo, Car Music Sole Wireless Bluetooth Stereo Transmitter und Systems Laptop Phone Built-in rechargeable lithium-ion battery can last up to 8 hours of playback time on a full charge. Can work while charging Plug and play, no driver required, designed for everyone everyday use, fit perfect in your pocket Easy pairing with Bluetooth stereo headset, headphones, speakers and other Bluetooth stereo audio enabled system. High performance Bluetooth 2.1 with A2DP for enhanced audio quality, allows you to enjoy the stereo music without wire restriction or watch TV quietly (not for answering calls). Work with any type and brand of device such as TV, PC, CD Player, iPod, Kindle Fire, MP3/MP4 etc. up to 30 feet working range Turns your regular stereo audio devices into a Bluetooth-enabled, wireless streaming machine thru 3.5mm audio-out jack