UHF Microphone Wireless System Moving Coil/Capacitor Microphone Wired to Wireless System Multifunctional 2.4G Wireless Adaptor for Signal Transmission Features: Adopts Integrated Digital Chips: intelligent noise reduction, high sound quality reduction, strong anti-interference, and help you restore excellent sound quality. Stable & Long-distance Reception: wireless transmission with 30M pickup distance, anti-interference and anti whistle, clear sound effect. Equipped with XLR to 6.35 Plugs for Transmitter & Receiver: it can be used in the speaker, mixer, amplifier, guitar and other sound equipment. Clear LED Display Screen: real time display of frequency band and electric quantity, letting you pay attention to electric quantity in time, and it is convenient e. Highlight the on / off condition of the machine to prevent forgetting to shut down. Built-in Long Endurance 500/800mAh Lithium Battery: high performance electric polymer lithium battery has a lasting endurance working hours. Attention: This product is a fixed frequency and cannot be tuned frequency. Specifications: Color: Dark gray Material: ABS Bandwidth: BLE2400-2483MHz Frequency Stability: ±30ppm Dynamic Range: >90dB Audio Frequency Response: 40Hz-18KHz Harmonic Distortion:<0.5% Operating Temperature: -10~50℃ Operating Voltage: 3.7V Working Distance: >20m Signal-to-noise Ratio: ≥100dB Duration: 6-8h (included) Delay: 3.0ms Distance: 30M Battery: 500-800mAh Item Size:   transmitter: 118 * 32 * 25mm / 4.65 * 1.26 * 0.98in   receiver: 113 * 32 * 25mm / 4.45 * 1.26 * 0.98in Item Weight: 183g / 6.48oz Package Weight: 410g / 14.46oz Package Size: 18 * 15.5 * 6.5cm / 7.09 * 6.10 * 2.56in Package List: 1 * Transmitter 1 * Receiver 2 * Converter 1 * Type-C Cable 1 * Manual (English)