Features:OOTDTYbrand new and high qualityTransmitter : Wirelely stream from a non-Bluetooth , home stereo or player to a Bluetooth-enabled headset/speaker/receiver.Receiver : Wirelely stream from a Bluetooth-enabled phone, tablet, or computer to a stereo, speakers, or headphones.Wirele noise reduction technology, clearer sound, easier and faster connection, more stable signal, faster transmiion.Transmit and receiver 2 insupport A2DP, SINK/A2DP, SOURCE,, two Bluetooth-compatible (headphones) at the same for timefor IDEAL for watching TVmovie-perfect synchronization. Used with APTX low latency supported devices.Specifications:Bluetooth-compatible version: V5.0RF power +4DBMBluetooth-compatible distance 10 meters MAX/33ftFrequency response 20-20KHzPerformance description:Charging input : 5VBattery charging saturation :4.2VBattery charging saturation for time is about 6~8 hours when fully charged, the red light is off and the blue light is for always onLow battery prompt 3.3V red light flashes 3 times every 2 minutes to remindLow power shutdown 3.0V red light on and shutdownShutdown quiescent current: 100nAWorking current :20~40mAFull battery life :30~38 hoursStandby time: 180 daysPackage Includes:1 PC x Transmitter Receiver1 PC x 3.5mm Aux Cable1 PC x ManualNote:Due to the problems of lighting effects and angles, there will be certain tolerances in the product, please understand.Please allow 0-1cm error due to the manual measurment.