A. The product is in a certain state and has certain qualities. B. Features: 1. It adopts 2.4GHz digital transmission technology, with a performance of 48K/24bit sound quality. The transmission is digital, has high - frequency anti - interference ability, and a 3M broadband to achieve a relatively good transmission effect. 2. It supports one - key switching of 4 channels, does not require pairing, and can support 4 groups of devices to be used simultaneously. Different devices can select different channels. 3. The indoor transmission distance can reach around 30 meters (1181 inches), and the transmission distance through partitions is around 15 meters (590.55 inches). 4. It has a battery life of about 5 hours, with a built - in rechargeable 650mAh polymer lithium battery. 5. It is equipped with a 6.35mm international standard audio head that can rotate 280°, and is suitable for most musical instruments. It can be folded close to the instrument when in use. C. Specification parameters: 1. Transmission sound quality: 48k/24bit digital transmission. 2. Transmission frequency band: 2.4GHz ISM frequency band. 3. Transmission distance: Around 30 meters outdoors, around 15 meters through walls. 4. Transmission delay: 10ms. 5. Signal - to - noise ratio: - 98db. 6. Distortion degree: 105db. 7. Frequency response: 20 - 20KHz; + 1db / - 3db. 8. Audio head rotation angle: 280°. 9. Number of multiple devices used simultaneously: 4 groups. 10. Battery: A rechargeable lithium battery with short - circuit protection, equipped with a one - to - two TYPE - C charging interface. D. Notes: 1. Due to manual measurement, an error of 0 - 1cm may occur. Please make sure you can accept it before making a decision. 2. Due to differences in different monitors, the pictures may not accurately reflect the actual color of the item. Thank you for your understanding. E. Package contents: 1 transmitter - receiver.