The built-in battery is a nickel-metal hydride battery.
It is resistant to deterioration and maintains the backup display for one hour when fully charged.
It takes about 20 hours to fully charge the battery.
By using a latching relay, alarm output is maintained even after a power outage.
The display operation is limited to two types: lighting and blinking.
This makes it easy to determine whether the fault has been resolved or not.
The amber lamp is designed so that the lit part is easy to see even from the side.
Input test settings and confirmation can be easily performed using the DIP switch.