Features:- Wireless transmitters and receivers can be used for electronic vocal instruments such as guitar, bass, Violin and so on.- Supporting 10 sets of equipment to use at the same time, the best effect is within 15 meters, the maximum transmission range can reach 30 meters.- 10 bands are optional and the receiver automatically tracks and matches- High gain and low gain modes are suitable for passive and active pickups.- UHF acoustic transmission, anti-interference, ultra-short delay.- Built-in rechargeable lithium battery, long working hours, equipped with USB cable, easy charging.- Plug and play, simple to use, small size, light weight, easy to carry. Specification:Audio Response Range: 20Hz-20kHzFrequency: 570 MHz-579 MHzTransmission Range: Best within 15m, Max 30m (barrier-free)Transmission Delay: <4msPower Supply: Built-in 3.7V 700mah rechargeable lithium batteryCharging Time: 2 hoursContinuous Use Time: 7 hoursCharging Port: Micro USBProduct Size: 11.8*4.5*1.5 cm (transmitter and receiver)Charging Line: About 21 cm (1 * USB, 2 * MicroUSB) Product Included:1*Transmitter1*Receiver1*USB Charging Line