ACE Electric Automatic School Bell Timer, Color : Light White

Automatic siren/school bell timer t72sb
features:
rtc format display 0:00 to 23:59 with led for day of the week.
Clock accuracy+/-30sec per month.
30 program steps
a different program possible each day
over midnight settings possible
bright red, 0.56" / 0.4" seven segment display for time indication
user-friendly programming using tactile switches
program enable provided
rechargable battery for clock
battery backup for 7days.
Memory back up in case of power failure for one week
operating voltage range: 85v to 265vac 50hz / 12v dc / 24v dc
1 c/o relay rated for 10a @ 250v ac / 28v dc (resistive)
power consumption:10va 3w
mounting method: front panel with side anchor
operating temperature:+5deg to +55deg.
Humidity:85%rh at 40degc.
Led indication: for relay output.
Programming: from front tactile switch.
Manual overide: available.
Dimension: 72mm x 72mm x 85mm (t72-ts)
applications : a must for institutions like schools, colleges, offices, factories, most useful for any real time based automatic operation to maintain definable duration intervals using (bell / siren) distinguish between normal between periods / lunch break /closing time bell, and respectively with between shifts in factories.