Welcome to the store! Sampling Rate: 48K/16bit high-definition transmission Transmission Band: 2.4GHz ISM Transmission Distance: 40 meters outdoors and 20 meters through walls. Transmission Latency: 12ms +Noise: -98dB Distortion: Less than 0.02% Dynamic Range: 105dB Frequency Response: 20-20KHz; +1dB/-3dB Rotation Angle: 282° Supported Device Groups: 8 simultaneously Battery: Rechargeable lithium batteries with short-circuit protection. 1 in 2 out Type-C USB charging cable Color: A: Black Material: ABS Package Contents: 1 * Receiver 1 * Transmitter 1 * Data Cable Only the above package content, other products are not included. Note: Light reflections and different displays may cause the color of the item in the picture to differ slightly from the real one. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!