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. 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. Specifications: Material: ABS Sample rate : 24bit / 48KHz lossless digital transmission sound quality Wireless Band: 2.4GHz Delay: 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 Package List: 1 * Receiver 1 * Charging Cable 1 * Audio Cable 1 * Manual (English)