After the transmitter and receiver are successfully paired, plug the transmitter into an electric guitar or other electronic musical instrument, and the receiver into a speaker and other power amplifier equipment to use. Both the transmitter and receiver are 6.35mm standard audio interfaces, which are suitable for various musical instruments, such as electric guitars, bass and electronic organs, etc. The LED screen display is more intuitive, and the power switch, volume button and USB charging port are designed on the side to make operation and charging more convenient. The built-in 500 mAh battery can be used for about 6 hours after two hours of charging, which is suitable for going out for performances. Equipped with cables, you can use a power bank or 5V charging head to charge the transmitter and receiver. 270 arbitrary rotation Specification: Color: Red/Black Material: Plastic Size Chart: 150x120x45MM/5.91x4.72x1.77inch Package Includes: 1 Piece USB cable 1 Piece manual 1 Piece w ireless transmitter receiver Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!