Use 2.4G technology for high-definition sound quality without delay transmission External antenna, better transmission effect Automatic connection when power on Support RCA & 3.5mm port Input Support RCA & 3.5mm port Output Receiver can drive headphones Support two-way volume control Wide range of power interface Type-c power supply Maximum transmission distance:50M RX power consumption:5V/45mA TX power consumption:5V/150mA RF frequency:2400Mhz Transmit power:14DB :67DB Frequency Range:20HZ---14.5KHZ Output the highest level:1.75Vp-p Colour:black Material:Aluminum alloy Package Contents: 1 x Wireless Audio Transmitter 1 x Wireless Audio Receiver 2 x USB Cable 1 x English manual 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.