Instead of having to remember – and perhaps someone stealing – your smart lock PIN code, Lockly Secure Plus quickly locks and unlocks via your fingerprint thanks to its capacitive fingerprint reader. Even the PIN codes are extra secure. Instead of a traditional 12-key keypad, Lockly's patented PIN Genie presents four touch circles with three numbers in each that always jumble, so simply watching you input a code sequence or looking fingerprints on the screen won't help a potential thief. Adding to your security are included sensors that can alert you if you haven't completely closed your door. Lockly's security flexibility extends to style – you can get versions for both deadbolt and latch versions. In case Lockly's batteries die, you can use a 9-volt cell to provide emergency power.