Features:The plug can be folded and can be used convenientlyWireless transmitters and receivers can be used for electroacoustic instruments like guitar, bass, violin...Uhf 730mhz original transmission, anti-interference, super short time delaySupport simultaneous use of 4 sets of devices, the maximum transmission range reach 50 metersBuilt-in rechargeable lithium battery provide long hours of work, equipped with USB cable, easy to chargeEasy to use, small size, light weight, and easy to carrySpecification:Color: blackMaterial: ABS, MetalAudio response range: 20Hz-20kHzFrequency: high frequency 806-809mhzTransmission range: max.50m (barrier-free); 30m (through the wall)Transmission delay: less than 4msCharging time: 2 hoursContinuous use time: 4 hoursCharging port: micro USBWeight: Approx. 237gPackage List: 1 x Transmitter1 x Receiver1 x USB Cable1 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.