This is a multifunctional wireless audio system designed for electric musical instruments. The transmission frequency band is 800MHz-900MHz, the transmission range is 50m barrier-free and 30m through the wall. With ultra low delay, original sound quality transmission, b anti-interference, 282-degree rotation 6.35mm audio interface, built-in rechargeable battery, the system is flexible to use, making music more free. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Red Material: ABS #43; Metal Transmission Sound Quality: 48K/ 24bit Digital Transmission Transmission Frequency Band: UHF (800MHz-900MHz) Transmission Range: 50m barrier-free; 30m through the wall Transmission Delay: #xff1c;5ms Signal to Noise Ratio (SNR): -98dB Distortion Degree: #xff1c;0.02% Dynamic Range: #xff1e;105dB Frequency Response: 20-20KHz, #43;1dB/-3dB Audio Head Rotation Angle: 282-degree Channel: 4 Built-in Battery: 650mAh Polymer Lithium Battery Item Size: 13.4 * 3.9 * 3.2cm / 5.28 * 1.54 * 1.26in Package Size: 14.5 * 10.2 * 4cm / 5.71 * 4.02 * 1.57in Package Weight: 150g / 5.30oz Package List: 1 * Transmitter 1 * Receiver 1 * USB Cable (Type-C) 1 * User Manual (English)