iClever Aluminum Wireless Bluetooth Stereo Transmitter and Audio Receiver 2-In-1 Adapter for Headphones, TV, Computer/PC, iPod, MP3 / MP4, Car Stereo and More Transmitter Mode (TX): Transforms any device (e.g. TV, computer, MP3 player, PSP) with 3.5mm audio-out jack into a Bluetooth-capable music streaming solution with no additional drivers required Receiver Mode (RX): Turns any ordinary speaker system (with 3.5mm audio-in jack) into Bluetooth-enabled music streaming solution with no additional drivers required Simple one-button switch to shift between transmitter(TX) and receiver(RX) mode Battery life for TX mode: about 11 hours; battery life for RX mode: about 6 hours Supported Bluetooth profiles: A2DP and AVRCP; operation range: 33 ft / 10m