• Durable body using metallic material

• Automatic lock / Re-lock / Double lock functions

• Safe to use the pin number with dummy number

• Multi-registrations for pin-number & electronic key

• Multiple volume control / optional mute

• Easy to detectable Blue-light button

• Emergency power (9V square battery)

• Anti high-voltage / anti fireproof / anti-hacking system

• Home networking of remote controller(CDL-3ARC)