M-VAVE WP-10 2.4GHz Wireless Ear Back Receiver Rechargeable Receiver of Wireless Earphone Monitor Transmission System Small size yet has lossless professional sound quality, low noise, low latency, good resolution. 2.4GHz wireless transmission band, 24 bit/48KHz sample rate. One key to switch mono/stereo, meet needs of your different device. 5 sets of equipment can be supported to work at same time. Built-in rechargeable -ion battery that can be conveniently charged by USB. Specifications: Delay: < 12ms Item Size: 54 * 45 * 13mm / 2.13 * 1.77 * 0.51in Wireless Band: 2.4GHz Item Weight: 31g / 3.64oz Frequency Response: 20 to 20KHz, +1dB / -3dB Package Size: 7.4 * 6 * 3.8ccm / 5.12 * 3.15 * 1.57in Signal-to-noise Ratio: -98dB Charging Device: USB charging cable Battery Capacity: 550mAh Package Weight: 89g / 5.08oz Material: ABS Dynamic : >105dB Sample rate : 24bit / 48KHz lossless digital transmission sound quality : 30 meters or 15 meters wall distance Package List: 1 * Manual (English) 1 * Receiver 1 * Charging Cable 1 * Audio Cable Small size yet has lossless professional sound quality, low noise, low latency, good resolution. 2.4GHz wireless transmission band, 24 bit/48KHz sample rate. Built-in rechargeable lithium-ion battery that can be conveniently charged by USB. 5 sets of equipment can be supported to work at the same time. One key to switch mono/stereo, meet the needs of your different device.