16GB File Storage, 48H Internal Recording: 16GB of internal storage can handle up to 48 hours of audio without compression. It can record separately and output audio files quickly to a computer using a data cable. 2.4Ghz Wireless Mic System: Comica BoomX-D2 PRO wireless lavalier microphone adopts advanced 2.4Ghz wireless technology, which can automatically adjust to the best channel to obtain a stable signal. Working distance of up to 328' transmission in an open area, ideal for YouTube video recording, interviews, vlogs, and ASMR recording. Safety, Mono, and Stereo Output Mode: Comica BoomX-D2 PRO wireless camera mic carries more audio modes than ever-mono, stereo, and safety mode. In safety mode, its sound will be divided into two tracks, and additional audio 6db lower than the recorded audio will be added, which can be used as backup audio. One-click Noise Cancellation: comica BoomX-D PRO lapel mic adopts a DSP denoise chip, which can effectively cancel out environmental