Safe on market/ark common lock has: mechanical password lock, electronic password lock, fingerprint lock, card lock.
Mechanical combination lock safe: oldest
Advantages: cheap price, long storage time;
Disadvantages: cumbersome operation, can not change the password.
Electronic combination lock safe: the most popular
Advantages: easy to operate, input wrong password or abnormal alarm, can modify the password;
Disadvantages: need to replace the battery regularly, the service life of mechanical type.
Fingerprint lock safe:
Advantages: fingerprint unique, not easy to be cracked open;
Disadvantages: The price is more expensive
Card type lock password box: swipe card open, common in hotels and other public places
Advantages: easy to use, can be associated with magnetic card;
Disadvantages: magnetic cards are easy to be stolen or lost, and easily damaged by strong magnetic lock.