Using 5.8G technology to achieve high-definition sound quality, transmission without delay. Receiving power consumption: 5v/140mA. Transmitting power consumption: 5V/210mA. External antenna, better transmission effect Automatic connection at startup Support analog-to-digital conversion and digital-to-analog conversion. The transmitter supports optical fiber, coaxial and 3.5mm interface inputs. The receiver supports optical fiber, coaxial and 3.5mm interface outputs. The receiver can drive the earphone. Note:Please use the receiver and transmitter within a barrier-free distance of 50 meters, otherwise there be a sound pause. Product introduction: This product is a wireless audio transmitter. It adopts 5.8G technology to realize high-definition sound quality and transmission without delay. The transmitter can transmit the digital audio signal of optical fiber and the coaxial or analog stereo audio signal of 3.5mm audio interface to the receiver for listening within 50 meters. The use of this product can solve the complicated operation problems of repeated switching/setting of the output audio format of the signal source and the messy cable binding. Color: Black Material: Metal Package Contents: 1pair * audio transmitters Only 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.