12v dc electric alarm/school bell timer:
1.ringing 80 times
2.time range;1s~23h&59min&59s,
3.battery replaceable
4.CE

Description: Weekly programmable bell timer is designed with high performance microcomputer

chip, it can automatically switch on the ring on fixed time, and realize

automatic ring with max. 80 times one day.

It is of the highest accuracy, reliability & durability.

Application: It is widely used in school, factory and etc.

Features:

wall hanging mounting80 times /dayworking voltage can be customizedringing time range:1s--23h 59min 59sCE, CCC, CQC approval

Specifications:

Capacitance: Resistance Load: 25A, Consumed power< 4VA

Timing Control Range: 1s-23h 59min 59s Timing error <±2s/day(25°C±1°C)

Temperature:-10°C~+50°C Relative Humidity: <95%

Dimension: 126×88×51mm Weight: 430 g

Battery: replaceable

For example

There is a factory has the working schedule as follows:

On duty: 8:00-12:00 am

14:00-18:00pm

From Monday to Friday.

On duty: 8:00-12:00 am for Saturday

The setting is following:

1. It needs to set 4 times ringing as the figures.

2. To choose the program serial number, press “+” to change it to 05, press “manual” key and “+” key for 3s, to cancel the program group later, make it as “--:--”.

3. Long press “MODE” key, make the system return to the clock state.

4. Press “MANU” key, make the control state as automatic.

5. Switch “manual/auto” key on the right to “auto”.