I. Scope of Application
       This product is a non-sparking bell, made of stainless steel, suitable for industrial and mining enterprises, government agencies, public places, schools, and instruments and equipment with a 50Hz AC voltage of up to 220V. It is used as a calling or notification signal, and also suitable for home doorbells, alarms, and other uses.

Two, Normal Operating Conditions:
       
1。Altitude no more than 2000 meters
       
2. The humidity of the surrounding medium shall not exceed +40 degrees and shall not be lower than -25 degrees. The relative humidity of the air shall not exceed 90% (when the temperature is +25 degrees).
       
3. Use in an environment free of flammable and corrosive gases, conductive dust, and significant shaking and impact vibrations.
       
4. The device can operate normally within the rated voltage ±10% and can work continuously for no more than 1 minute.
       
Pollution level is Grade 2, installation category is Class II.

 Note: The default voltage is 220V, but other voltages can be customized. Please contact customer service for more information.