1、Wireless transmitter and receiver can be used for instruments such as guitar, bass, violin and so on. 2、Support the use of 10 groups of equipment at the same time, within 15 meters, the maximum transmission range is up to 30 meters. 3、10 Frequency bands are optional, and the receiver can track and match automatically. 4、Acoustic transmission, anti‑interference, short delay. 5、Built‑in rechargeable lithium battery, long working time, equipped with USB cable, easy to charge. Features: Wireless transmitter and receiver can be used for instruments such as guitar, bass, violin and so on. Support the use of 10 groups of equipment at the same time, within 15 meters, the maximum transmission range is up to 30 meters. 10 Frequency bands are optional, and the receiver can track and match automatically. Acoustic transmission, anti-interference, short delay. Built-in rechargeable lithium battery, long working time, equipped with USB cable, easy to charge. Plug and play, easy to use, small size, light weight, easy to carry. Has passed the FCC RoHs CE certification. Specifications: Condition: 100% brand new Material: Plastic Color: Black, Colorful (optional) Audio Response Range: 20Hz-20khz Frequency: 570 MHZ to 579 MHZ Transmission Range: The Best Within 15m, The Maximum Range 30m (barrier-free)Transmission Delay: Less than 4ms Power Supply: Built-in 3.7v 700mah rechargeable lithium battery Charging Time: 2 Hours Continuous Use Time: 7 Hours Charging Port: USB Size: Approx. 11.8*4.5*1.5cm/4.6*1.8*0.6inch Charging Line: Approx. 21cm/8.3inch Weight: Approx. 186g Package List: 1 x USB Line 1 x Receiver 1 x Transmitter