brand new and high quality,2.4GHz high-quality lossless digital transmission, 48K/24bit performance sound quality, full digital, high-frequency anti-interference, for broadband, lossless transmission. One-key switching of 4 channels, no need to pair, support 4 groups of devices to use at the same , different devices can choose different channels. Transmission distance of 30 meters/1181inches indoors, 15 meters/590.55inches for transmission through partitions. 5 hours high-energy battery life, built-in rechargeable 650mAh polymer lithium battery. 6.35mm international standard audio for head, 282 rotatable, suitable for almost all musical instruments, and can be folded close to the musical instrument when in use. Transmission sound quality:48k/24bit lossless digital transmission Transmission frequency band:2.4GHz frequency band Transmission distance:30 meters outdoor transmission: 15 meters through the wall transmission Transmission delay:10ms Signal-to-noise ratio:-98db Distortion:Less than0.02% Dynamic range:Greater than105db Frequency response:20-20KHz; +1db/-3db Rotation angle of audio head:280 Simultaneous use of multiple devices:4 groups Battery:Rechargeable lithium battery that supports short circuit for protection, one with two TYPE-C charging Colour:Silver Material:ABS Package Contents: 1 * Guitar System Transmitter 1 * Guitar System Receiver 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.