last updated 16 Oct 2020
Tom's notes:
- pushing each of the digit buttons turns it "on"
- once on, they aren't turned "off" until the box is opened or you push "clear"
- to open, all of the correct digits and none of the incorrect digits need to be "on"
- This means:
- order doesn't matter (7426, 2476, 7624 and all other permutations will work)
- pushing a digit a second time doesn't matter (53265 would also work)
- pushing any incorrect digit means you need to clear and reenter the correct combo (15326 won't work)
- when selecting a combo, we should choose between 3 and 6 unique digits. i.e., too many digits is as bad as too few, especially if someone knows how many digits are in the combo, and "1221" is the same as "12".
Kidde KeySafe User Guide