Avantree Lock Portable Pre-paired aptX LOW LATENCY Bluetooth Transmitter and Receiver Audio Adapter Set for Outdoor Use, TV Watching, Headphones, Speakers, Plug & Play, No Delay, 3.5mm AUX & RCA BLUETOOTH ALL OVER YOUR HOMEWhether you are watching your favorite TV shows or movies or Bluetooth enabling your home stereo system for an outdoor party, our adapter set allows the transmitter unit to Bluetooth-enable your TV, PC, AVR or other audio source, while the receiver turns your wired headphones or speakers into a Bluetooth streaming machine! NOT A TECHNIE? NOT A PROBLEMOur devices feature auto-pairing for a truly plug-and-play experience. Simply turn on both devices, wait for them to signal that they have connected, and enjoy your streaming experience! Both the transmitter and receiver feature aptX- Low Latency technology enabling you to enjoy your favorite movies-without the lip sync delay common with other Bluetooth devices. VIDEO RECORDING WITHOUT DELAYMake home movies or other recordings by plugging the receiver into your camcorder and the transmitter into your microphone. Thanks to the low latency technology, there will be no lip sync delay with the picture and sound. BLUETOOTH REPEATER BOOSTERListen to your music throughout your home! Simply connect your Bluetooth-enabled phone / PC / tablets to the receiver, the transmitter unit to Bluetooth headphones or speakers, and the 3.5mm cable to connect both the transmitter and receiver. This allows the reach of your music to be extended throughout your home. INDOOR & OUTDOOR USEWhen using indoors, connect the transmitter to a USB charger for ongoing power and bettery life. For use outdoors, the built-in battery will last up to 6 hours of play time for your listening enjoyment. Pre-paired Lock Set, plug &amp; play, easy to use. Compatible with devices with 3.5mm AUX or RCA audio output. aptX low latency, no audio delay for TV, headphones, speakers, video recording. USB power or battery power (6 hours play time), portable outdoors or indoors. Not same as Saturn Pro (which is transmiter and receiver 2 in 1). One works as a transmitter and another as a receiver. Not compatible with optical digital  /  pc usb audio output. No volume control button. Avantree Lock TX Avantree Lock RX 3.5mm to 3.5mm audio cable RCA audio cable 3.5mm audio connector Micro USB charging cable Quick user guide User Manual Bluetooth 3.0, Bluetooth profile: A2DP Audio codec: aptX-LL, aptX, Fast Stream, SBC Operating Range: Class 2, 10 meters Working time: up to 6 hours; Charging time: around 2-3 hours Battery: 270mAH rechargeable Li-ion battery Charging input voltage: DC 5V; Weight: Approx. 20g Bluetooth 4.2; Bluetooth profile: A2DP and AVRCP Audio codec: aptX-LL, aptX, SBC Operating Range: Class 2, 10 meters Working time: up to 8.5 hours; Standby time: up to 250 hours; Charging time: around 2-3 hours Charging input voltage: DC 5V; Battery: 270mAH rechargeable Li-ion battery Weight: Approx. 20g