Do you usually forget where you kept your house keys? Maybe you tie a string to remember where you last left it just before you forget what the string was for in the first place. Your finger is the only key you’ll ever need for the biometric fingerprint door lock. This one is not bad-looking, and the price ($199) is pretty reasonable. A bonus: you’ll never leave your door unlocked again because this puppy is a guard dog that locks automatically. Uses 4 AA batteries; no PC connection needed. Fingerprint verification and door lock are combined in single unit for easy installation. It’s available for doors that open either from the left or the right.

Fingerprints can be registered or erased directly with the lock on your door – and, if your circle of trust is wide, the biometric lock will accommodate prints from up to 120 of your closest friends.

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