Features: UHF high-quality digital transmission, 48K/24bit transmission sound quality, low noise and anti-interference, plug and for play. Transmission distance of 50m/164ft indoors, transmission distance of 30m/98.42ft through partition walls. 5 hours of high-energy battery life, built-in rechargeable 650mAh polymer lithium battery. 4 channels can be switched with one for key, no pairing is required, 4 groups of devices can be used at the same for time, and different devices can choose different channels. 6.35mm international standard audio for head, 282° rotatable, suitable for almost all electric musical instruments, and can be folded close to the musical instrument when in use. Specifications: Material: plastic + metal Transmission sound quality: 48k/24bit digital transmission Transmission frequency band: UHF (800MHz-900MHz) frequency band Transmission distance: outdoor 50 meters Transmission: 30 meters through the wall transmission Transmission delay: >5ms Signal-to-noise ratio: -98db Distortion: <0.02% Dynamic range: >105db Frequency response: 20-20KHz; +1db/-3db Audio for head rotation angle: 282° Simultaneous use of multiple devices: 4 groups Battery: built-in rechargeable lithium battery, one for two TYPE-C charging Size: Approx. 13.4x3.9cm/5.27x1.53inch Package Includes: 1x Transmitter 1x Receiver 1x TYPE-C Data Cable note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.