M-VAVE WP-10 2.4GHz Wireless Ear Back Transmitter Rechargeable Emitter of Wireless Earphone Monitor Transmission System Features: Small size yet has lossless professional sound quality, low noise, low latency, good resolution. 2.4GHz wireless transmission band, 24 bit/48KHz sample rate. 30 meters long distance effective transmission distance. One key to switch mono/stereo, meet the needs of your different device. 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. The transmitter acts as a collar-clip wireless microphone and can be used as a pocket-strapped transmitter. Specifications: Material: ABS Sample rate : 24bit / 48KHz lossless digital transmission sound quality Wireless Band: 2.4GHz Delay: < 12ms Range: 30 meters outdoor or 15 meters wall distance Lithium Battery Capacity: 780mAh Charging Device: USB charging cable Signal-to-noise Ratio: -98dB Dynamic Range: >105dB Frequency Response: 20 to 20KHz, +1dB / -3dB Item Size: 54 * 45 * 13mm / 2.13 * 1.77 * 0.51in Item Weight: 31g / 3.64oz Package Weight: 89g / 5.08oz Package Size: 7.4 * 6 * 3.8ccm / 5.12 * 3.15 * 1.57in Packing List: 1 * Transmitter 1 * Charging Cable   1 * Audio Cable 1 * Manual (English)