AP031-1 3 in 1 Noise Reduction Lavalier Wireless Microphone 1. By connecting the microphone wirelessly, real-time audio reception is zero-delayed, and wireless free connection is realized. 2. Automatic pairing, free from shackles. Plug in the receiver and it will automatically connect without cumbersome operations. 3. High-performance wireless microphone technology, stable signal, up to 120 meters wireless receiving distance. 4. Built-in DSP noise reduction chip, anti-interference, and effectively identify the original sound. 5. 2.4G transmission frequency, low delay, fully expanded audio channel and stable transmission. 6. 360-degree omnidirectional radio, high-sensitivity digital silicon microphone, 99 percent restore high-definition radio. 7. Parameters: Input voltage: 5V Frequency range: 20Hz-20KHz Signal-to-noise ratio: greater than 100dB Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.