A8 UHF Wireless System Guitar Pickup Audio Transmitter Receiver for Electric Guitar Bass Violin Parts Built-In Rechargeable Battery Feature: 1. The wireless transmitter and receiver can be used for electro-acoustic instruments such as guitar, bass, violin, etc. 2. Ultra-high frequency 730MHz original sound transmission, anti-interference, ultra-short time delay. 3. Support 4 groups of devices to be used at the same time, the maximum transmission range can reach 30 meters. 4. Built-in rechargeable lithium battery, long working time, equipped with USB cable, convenient charging. 5. Plug and play, easy to use, small in size, light in weight and easy to carry. Specification: Product name: Wireless audio system Model: A8 Interface: Micro USB Frequency range: UHF Frequency broadband: 20Hz-20KHz Transmission delay: >4ms Product size: 110x43x17mm/4.33x1.69x0.67in Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 X Transmitter 1 X Receiver 1 X USB Cable 1 X Manual Plug and play, easy to use, small in size, light in weight and easy to carry The wireless transmitter and receiver can be used for electro-acoustic instruments such as guitar, bass, violin, etc Built-in rechargeable lithium battery, long working time, equipped with USB cable, convenient charging Support 4 groups of devices to be used at the same time, the maximum transmission range can reach 30 meters Ultra-high frequency 730MHz original sound transmission, anti-interference, ultra-short time delay