Features: brand new and high quality 2.4GHz high-quality lossless digital transmission, 48K/24bit performance sound quality, full digital, high-frequency anti-interference, for 3M broadband, lossless transmission. One-key switching of 4 channels, no need to pair, support 4 groups of devices to use at the same for time, 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. Specifications: Transmission sound quality: 48k/24bit lossless digital transmission Transmission frequency band: 2.4GHz ISM frequency band Transmission distance: 30 meters outdoor transmission: 15 meters through the wall transmission Transmission delay: 10ms Signal-to-noise ratio: -98db Distortion: <0.02% Color:Silver Black Dynamic range: >105db 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 Package Includes: 1 x Transmitter Receiver. 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 you!