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. Specifications:
Material: ABS
Sample rate : 24bit / 48KHz lossless digital transmission sound quality
Wireless Band: 2.4GHz
Delay: < 12ms
Ran-ge: 30 meters outdoor or 15 meters wall distance
Lithium Battery Capacity: receiver 550mAh
Charging Device: USB charging cable
Signal-to-noise Ratio: -98dB
Dynamic: >105dB
Frequency Response: 20 to 20KHz, +1dB / -3dB
Item Size: 54 * 45 * 13mm / 2.13 * 1.77 * 0.51in 
Item Weight: 103g / 3.64oz
Package Weight: 144g / 5.08oz
Package Size: 13 * 8 * 4cm / 5.12 * 3.15 * 1.57in

Packing List:
1 * Receiver
1 * Charging Cable
2 * Audio Cable
1 * Manual (English)