Mini DVR is a small analog video recording module for SD card. DVR is commonly used in FPV goggles where it is often integrated. But if the glasses don't have a DVR, it can be added just by using an external module. The DVR module has an integrated battery that is recharged using a micro USB connector. Video input and output is via a 4-pin Jack connector. The video output is used for video preview and possible playback of recordings. The DVR supports SD cards up to 32GB with FAT32 format.