high quality Noise Cancellation & One Key Mute: There is a noise cancellation button and a mute button on the transmitter. A short press turns on noise cancellation to effectively reduce noise and harvest pure sound. Mute is switched on at the touch of a button depending on the recording needsBuilt-in Omnidirectional Mic and 7 Levels Gain Adjustment: The transmitter has a built-in omni-directional microphone to capture sound sources in all directions and a 3.5mm microphone input for access to an external lavalier microphone (not included). 7 levels of gain adjustment are available to meet different recording needsLong Battery Life and 198ft Operating Range: BY-M1V6 wireless microphone system for stable wireless signal transmission up to 60m (Without Barrier), fully charged in 2 hours, transmitter works for 6 hours, receiver powered by iOS deviceWireless Microphone for iPhone: BY-M1V6 is a 2.4GHz wireless microphone system that provides high-quality sound for live streaming, vlogging, course recording, and other audio capturing applications.With an MFi Certified Lightning output, the BY-M1V6 is designed for Apple iOS devices, and it comes with 1 transmitter and 1 receiverMono/Stereo Output Mode Switching: The mono and stereo outputs on the receiver can be switched as required (Click to switch using the included pairing pin) to facilitate post-production audio editing