Gateman V20 Manual ((full)) Link

To prevent strangers from guessing your code via fingerprint smudges, the V20 requires you to touch the keypad with your palm before or after entering your PIN.

Note: Registering a new card will typically delete all previously registered cards, so scan them all in one session. gateman v20 manual

When the batteries are low, the lock will play a specific melody (often "To Elise") after every use. Change them immediately. To prevent strangers from guessing your code via

You must touch the keypad or press the button to lock it. gateman v20 manual