Switching/setting the output audio format of the signal source and the problem of messy cable binding. Therefore, it is widely used in home audio-visual, schools, squares, electronic games and other places.Use 2.4G technology for high-definition sound quality without delay transmission.Transmitter support OPTICAL,COAXIAL Digital audio input.Support AC-3/DTS/PCM signal.Receiver built-in lithium battery.Receiver low power consumption, 7 hours standby battery life.The transmitter has an external antenna for better transmission.Receiver can drive headphones.Receiver supports volume adjustment.The receiver has a lavalier function for easy portability.Maximum transmission distance:50mReceiver built-in battery:Lithium polymer batterybattery capacity:250mA/HStandby battery life:about 7 hoursCharging:5V/200mARF frequency:2400MhzTransmit power:14DB:67DBFrequency Range:20HZ-14.5KHZSampling Rate:44.1Khz-96KHZ/24bitSupport audio format:Compatible-AC-3/DTS/PCMOutput the highest level:1.75Vp-pColour:BlackMaterial:PlasticPackage Contents:1 * transmitter1 * receiver2 * Power lineOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.