Features: The plug can be folded and can be used conveniently Wireless transmitters and receivers can be used for electroacoustic instruments like guitar, bass, violin... Uhf 730mhz original transmission, anti-interference, super short time delay Support simultaneous use of 4 sets of devices, the maximum transmission range reach 50 meters Built-in rechargeable lithium battery provide long hours of work, equipped with USB cable, easy to charge Easy to use, small size, light weight, and easy to carry Specification: Color: black Material: ABS, Metal Audio response range: 20Hz-20kHz Frequency: high frequency 806-809mhz Transmission range: max.50m (barrier-free); 30m (through the wall) Transmission delay: less than 4ms Charging time: 2 hours Continuous use time: 6 hours Charging port: micro USB Weight: Approx. 237g Package List: 1 x Transmitter 1 x Receiver 1 x USB Cable 1 x Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. The plug can be folded and can be used conveniently Wireless transmitters and receivers can be used for electroacoustic instruments like guitar, bass, violin... Uhf 730mhz original transmission, anti-interference, super short time delay Support simultaneous use of 4 sets of devices, the maximum transmission range reach 50 meters Built-in rechargeable lithium battery provide long hours of work, equipped with USB cable, easy to charge