Smof 2-in-1 Bluetooth Transmitter Receiver,Bluetooth Car Kit/Portable Wireless 3.5mm Audio Adapter forTV,PC,MP3/MP4,CD Player,iPhone,Home/Car Audio Systems One product with two Blutooth function,2-in-1 Blueooth adapter,with a simple push:One-button switch to shift between TX(Transmitter)and RX(Receiver) mode for your optional use.Please note,you should power off first before change the using mode Bluetooth Transmitter(TX):It can help to stream audio from your non-Bluetooth devices like TV, MP3, CD player, PC, eBook reader to your Bluetooth-enabled headphones, speakers or receivers.Enjoy your favorite programs or shows at late night without disturbing your family members Bluetooth Receiver(RX):Ideal for home or vehicle/car music streaming sound system.Turn your normal no-Blueotoh speakers,headset/headphones,audio/music play system to be Bluetooth enabled.Enter0000if needed when pair to it Supported Bluetooth profiles: A2DP,AVRCP;Working range: 33 ft/10m;Battery life for TX mode:about 8 hours; battery life for RX mode:about 6 hours,and can be used while charging;it will automatically re-connect to the last paired Bluetooth device Package contents: Smof Bluetooth Transmitter and Receiver, 3.5mm audio cable, micro USB cable, instruction manual.We provide friendly easy-to-reach supportservice,12-month worry-free guarantee