Item Type: Wireless Guitar System Material: Plastic + Metal Colour: Black Frequency Range: UHF Frequency Bandwidth: 20Hz-20KHz Transmission Delay: <4ms Charging Interface: Micro USB Charging Time: 2 Hours Use Time: 4 Hours required Battery: Lithium battery 600mAh, 1pc for receiver and pc for transmitter (shipped with built in battery). Package List 1 x Receiver 1 x Transmitter 1 x User Manual 1 x Connecting Cable 1Reliable Use: Using digital wireless transmission technology, has a long distance and excellent pickup effect as well. 2Better Sound: The UHF original sound transmission with good anti interference performance ensures great sound quality. 3Little Delay: Able to provide a full 20Hz20kHz frequency response, which enables 4ms delay, low noise and low latency. 4With Battery: The built in battery has a long working time up to 4 hours, and can be easily charged through USB cable. 5Easy Carrying: Comes with light weight and compact size, the simple storage and carrying suit for indoor and outdoor.