Okeyn Bluetooth Transmitter and Receiver, Wireless Stereo Audio Transmitter and Receiver 2-in-1 Bluetooth Adapter With 3.5mm Stereo Output(Black) Simple one-button switch to shift between transmitter(TX) and receiver(RX) mode. Inner 170mAh li-battery, LED indicator, one touch connect button Easy pairing with bluetooth stereo headset, headphones, speakers and other bluetooth stereo audio enabled system. Work with any type and brand of audio source device Bluetooth 3.0 with A2DP for high quality audio sound with 3.5mm stereo audio output, allows you to enjoy the stereo music without wire restriction or watch TV quietly Small, lightweight and durable! Gives you the freedom of streaming from any audio source within a 10-meter range. Take the transmitter with you and enjoy bluetooth music anytime for up to 9 hours DuaFire magic device. 2-in-1 Bluetooth stereo transmitter and receiver that can add Bluetooth capability to your none-bluetooth audio source device like TV, iPod, CD player, PC, MP3/MP4, and transmit audio to your bluetooth headphone, speaker and other stereo system