Whether you're looking for added security for your front door or your bedroom door, installing a keypad lock or a fingerprint lock will give added peace of mind that your keys aren't being copied without your knowledge. The Fingerprint ID Door Lock w/Keypad/Audit Trail combines these two systems, providing easy access only to those whose unique fingerprints have been programmed and to those to whom you confide your programmed PIN, which can be changed at any time. Six AA batteries are required to use this door lock and are sold separately. The Fingerprint ID Door Lock w/Keypad will accept up to 50 fingerprints in its system, providing keyless access to your entire family or your small business. Since the PIN can be changed regularly, it's an easy way to allow a service person access to your home or business when you're not there — and a much safer way than hiding a key that can be stolen or copied! Four keys are included for emergency entry should the occasion arise. After correctly matching your fingerprint to the one programmed into its memory, the lock body is unlocked, and the system will power off automatically to save electrical power. If the batteries become low, you will hear four alert beeps when the lock is used. Replace the batteries as soon as possible; the Fingerprint ID Door Lock w/Keypad's non-volatile memory will retain all enrolled fingerprints and other setup functions. Monitor the people going into your home or office using the Fingerprint Lock w/Keypad's audit trail. Install the included software on your PC to run the Lock Audit program. Use the included data cable to connect the lock unit to your computer's RS-232 serial port, and the software will keep track of all uses of the Fingerprint Lock, whether by passcode or fingerprint, noting the time and date of each entry. The records can be maintained on your computer. Note: If an emergency key is used to unlock the lock, there will be no audit report transaction, as the key cylinder is not tied into the electronics of the tracking system. The Fingerprint Lock w/Keypad/Audit Trail is also available for left-handed doors. If you don't need to keep track of entries, try the Fingerprint ID Door Lock w/Keypad (also available for left-handed doors.