FPV Mini DVR Recorder - HM Digital Video Recorder for FPV Multicopter - HMDVR

Step3: Important! 1x HMDVR Video Recorder. How to flash firmware for HMDVR. Step 2: Put the TF-SD card into HMDVR, and power on, the red Led will first flashing slowly and then flashing quickly, firmware upgrading successfully once the red LED turn off.