100 percent brand new and high quality Features:2.4GHz high-quality lossless digital transmission, 48K or 24bit performance sound quality, full digital, high-frequency anti-interference, 3M broadband, lossless transmission.One-key switching of 4 channels, no need to pair, support 4 groups of devices to use at the same time, different devices can choose different channels.Transmission distance of 30 meters or 1181inches indoors, 15 meters or 590.55inches for transmission through partitions.5 hours high-energy battery life, built-in rechargeable 650mAh polymer lithium battery.6.35mm international standard audio head, 282 rotatable, suitable for almost all musical instruments, and can be folded close to the musical instrument when in use. Specifications:Transmission sound quality: 48k or 24bit lossless digital transmissionTransmission frequency band: 2.4GHz ISM frequency bandTransmission distance: 30 meters outdoor transmission: 15 meters through the wall transmissionTransmission delay: 10msSignal-to-noise ratio: -98dbDistortion: 105dbFrequency response: 20-20KHz and1db or -3dbRotation angle of audio head: 280Simultaneous use of multiple devices: 4 groupsBattery: Rechargeable lithium battery that supports short circuit protection, one with two TYPE-C charging Note:Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank youPackaging Includes:1 x Transmitter Receiver.