Please note that you need a service of a certified electrician to install this devices for you at a token fee.
this device enables you to know when electric power has been restored from the electric distribution company serving you. it can also be used as a security system or notification system. with the external diameter of 80/100mm which makes the output of 40w sound volume. suitable for warning information of small hoist, light transfer cars and the inside of small vessel. body standard color : red material is steel. this alarm is useful for seciruty of warehouses, homes, shops... etc.