The BioMetric fingerprint lock adopts manifold electrostaticproof technology, avoiding any interruption. A special paint used especially on warships is applied, keeping the ICs from deteriorating and ensuring the lock to last more than 20 years. The lock allows for multiple access models, including fingerprint, password, password plus fingerprint and key. It holds 150 fingerprints, 450 passwords and 240 ID numbers. It is powered by four AA alkaline or electronic batteries. Users can register new fingerprints and delete old ones at designated places, without having to reenroll everyone.