Auto Bell Timer Plus Electric Sch Bell Black Cast 250mm

automatic bell timer product designed with high performance microcomputer chip, it can automatically switch on the bell according to the fixed time, and realize automatic ring with max. 80 times one day. It is widely used in school, factory and etc. Specifications: Working voltage AC240V Timing error 0.5s/day Load capacity Resistance 25A Temperature -10C~+50C Dimension 126×88×51mm Max time length 1s~23h59m59s Voltage scope 85%~110% Consumed power <4W Relative Humidity <95% 6 buttons, "MODE" "SELE" "+" "-" "AUTO/MAN"