Product name: 2.4G audio wireless transceiver Product channel: 2.4GHz ISM band System frequency response: 10Hz-22KHz ±1dB Effective use distance: within 30 meters Distortion: Less than 0.02% Fully charged working time: 10H The transmission distance is up to 30 meters, get rid of the shackles of wires and play without stopping. The plug angle can be rotated 220 degrees to fit all electric guitars, including Stratocaster-style electric guitars with rockers. 6.5/3.5MM dual plug is more compatible Electric guitar, bass, electric blowpipe, electric violin, electric drum, electric guzheng and other electroacoustic instruments Just plug the transmitter into an electric guitar/electric blowpipe/electronic keyboard and other electroacoustic instruments, and the receiver into a playback device such as a speaker. Colour:Black Material:plastic Package Contents: 2 x receiver 2 x transmitter 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.