-Over-long endurance of electricity and hundreds of thousands of passwords for safe escort.
-Alloy casting, strong and durable.
-User code is 1 to 8 digits long, 100000 of possible combinations.
-Batteries can be used in one year.automatic low battery warning.
-Automatic alarm four times against malicious breaking user codes.
-Board thickness 18-22mm
-Steel plate thickness 0.5-3.0mm
