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 This product is a wireless audio transmitter, using 2.4G technology for high-definition sound quality without delay transmission,The transmitter can transmit the 2.0 analog stereo audio signal of RCA and 3.5mm audio interface to the receiver at a distance of 50meters for listening. Using Nsendato of 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 audio-visual, schools, squares, electronic games and other places 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:ABS Package Contents: 1 * audio receiver 1 * audio transmitter 2 * usb cable 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.