Operating voltage:  AC 110V/220V (±10%)   ,  DC 12V/24V

The default frequency is 50hz. If 60hz is required, contact customer service to check whether it is available and make remark

Please be sure to check the voltage frequency in your country, the wrong frequency may cause the bell to not work properly!!

Bell diameter: 50 mm (2 inch) / 75 mm (3 inch) / 100 mm (4 inch) / 150 mm (6 inch)

Material: Stainless steel

1. It is suitable for factories, schools, railways, indoor public places, etc. as sound signals and alarms.

2. Made of stainless steel material, it has a better anti-rust effect and a longer service life.

3. With a built-in double coil, it is durable and stable.

4. The electric bell is of internal stroke type and generates no spark.

5. There are three round holes on the cover plate to facilitate the installation of the bell on the wall.