Wireless In Ear Monitor System provides high-quality wireless monitoring for stage performances and studio recordings. Its design makes it portable and easy to use. Rechargeable: The wireless earphone transmitter is rechargeable and can be used for a long time. you can also use it as a phone charger, which is very convenient. High speed: High speed, low power consumption, long service life, no need to worry about the loss of battery. Feature: Small size yet has lossless professional sound quality, low noise, low latency, good resolution. 2.4GHz wireless transmission band, 24 bit or 48KHz sample rate. 30 meters long distance effective transmission distance. One key to switch mono or stereo, meet the needs of your different device. Built-in rechargeable lithium-ion battery that can be conveniently by USB. Specifications: Sample rate: 24bit or 48KHz lossless digital transmission sound quality Wireless Band: 2.4GHz Delay: Less than 12ms -: 30 meters outdoor or 15 meters wall distance Charging Device: USB charging cable Signal-to-noise Ratio: -98dB Dynamic: 105dB Frequency Response: 20 to 20KHz, and1dB or -3dB color: Black material: plastic Package Contents: 1 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.