How to update:
1.Delete all the files and folders in the tf card(suggest:8G/16G).
2.Download the firmware to sd card .
3.Put the sd card into camere(make sure battery > 50%).
4.Power on the camera and it will update firmware automatically.
5.When updating, the LED will flash.
6.When update finish, LED will ON.
7.Take the card out, delete the firmware file in the sd card.