TF card and wireless microphone transmitter record audio synchronously. You can select "Record Menu"-"Enable", insert the 32G (Max) TF card into the wireless microphone transmitter to prevent audio loss during real-time shooting and prevent audio recording loss due to external channel interference with breakpoints. Note: Not included TF card

Wireless lavalier microphone system compatible with Nikon Canon Sony DSLR camera, camcorder, iPhone Android smartphone, iPad and More. Wireless lapel microphone is the best choice for YouTube live, Video recording, Audio recording, Vlog recording, Interviews, Micro film recording, Podcasts, Wedding, Mobile journalists, Content creators, ENG and EFP etc

Record crystal-clear, distortion-free audio. Adopts international UHF wireless transmission, 1 receiver triggered by 1 transmitter, which can be used for multiple devices working together, Adjustable RF signal strength or auto-scanning for quick channel selection to A/B group.With LCF low cut filtering Mode and Manual / Auto-sync.

The wireless lavalier microphone system, each unit is powered by two "AA" batteries (Not included) for up to 5 hours of operation. The farthest range 500 ft (150m) in open areas, best-receiving range is within 246 ft (75m).