Wireless Audio Transmission Kit with Transceiver-Receiver for Bass Violin with Electric Guitar . DURABLE GUITAR WIRELESS SYSTEM Characteristic: 1. One end is connected to the audio port of the instrument , the other end is connected to the sound system, transmitting audio signals wirelessly. 2. Equipped with USB charging cable, two Micro USB plugs, transmitter and receiver can be charged at the same time. 3. There are four channels, you can use up to four systems at the same time, the signals will not interfere with each other. 4. Transmitter indicator light: When activated, the indicator light will indicate the channel number according to the corresponding channel flashing time. Later, the red light continues to shine, being in the broadcasting state. 5. Receiver indicator light: When activated, the indicator light will indicate the channel number according to the corresponding channel flashing time. . DURABLE GUITAR WIRELESS SYSTEM technical date: Material: plastic metal Black color Channel: 4 Frequency Response: UHF System Frequency Response: 20Hz 20kHz Frequency: 730MHz Memory clock speed Transmission Distortion: Waiting time: Power supply: 3.7 V/600 mAH and USB cable Charging time: Working Hour: 46 hours (full charge) Size: approx. 11*4.3*1.7cm/4.30*1.68*0.66inch Weight: approx. 269 g . DURABLE GUITAR WIRELESS SYSTEM List of packages: 1 * Transmitter 1 * Receiver 1 * USB charging cable 1 * Instructions . DURABLE GUITAR WIRELESS SYSTEM