Introduction: Transmit it to the receiver at a distance of 50 meters for listening, transmitter also support R/L stereo input. This product has similar functions to BT, but the sound quality and delay parameters are better than BT. Using this product can solve the problem of tedious operation of repeatedly 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. Feature: 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. Specification: Maximum transmission distance: 50m. Receiver built-in battery: Lithium polymer battery. Battery capacity: 250mA/H. Standby battery life: about 7 hours. Charging: 5V/200mA. RF frequency: 2400Mhz. Transmit power: 14DB. SNR: 67DB. Frequency Range: 20HZ---14.5KHZ. Sampling Rate: 44.1Khz~96KHZ/24bit. Support audio format: Compatible-AC-3/DTS/PCM. Output the highest level: 1.75Vp-p. Package: Receiver, Transmitter, User Manual, USB Power Cable