220v Power Failure Alarm, Home Security Computer Room Fish Pond Farm High Decibel Alarm feature: LED indicators show power outage\/fault alerts and power conditions. The siren will sound when power is cut off until power is restored. Warnings can be manually silenced with an on\/off switch. Drawer battery cover design for easy battery replacement. High-voltage design, the power supply voltage can work normally even if the power supply voltage exceeds the standard. Purpose and scope of application: The applicable circuit of the power failure alarm is used for power failure reminder, and is widely used in telecommunications room, hospitals, farms, industrial and mining enterprises, institutions, substations, etc. As a power outage warning, a power outage reminder product. This product is small in size; excellent and reliable performance; alarm sound reaches 120 decibels Alarm product features: 1. It can be used in conjunction with other alarm monitoring systems. When criminals attempt to cut off the power supply (making the monitoring or alarm system invalid), the alarm will immediately give a high-pitched alarm. 2. Under normal power supply conditions If there is a sudden power failure (power failure or tripping), the alarm will sound the alarm immediately. (The switch can be turned off to terminate the alarm,) When the power supply is restored, the alarm will be terminated immediately, and the alarm conversion time: 0.5 seconds 3. Alarm power supply: 9V laminated battery (not included in delivery) 4. Monitoring voltage: AC150v-400v, 50 ~ 60Hz (high voltage resistance design, this product can be used for 220 city electricity 5. Alarm volume: 120 decibels. (The volume of the sound is similar to that of the alarm that comes with some electric vehicles) 6. Built-in automatic trickle charging (which can effectively offset the battery self-discharge during standby), both ordinary batteries and rechargeable batteries can be used. (The battery is not draining when in standby) 7, can not be used in high temperature environment above 60 degrees 1. Due to different monitors and lighting effects, the actual color may be slightly different from the image 2. Due to manual measurement, please allow 1-3cm deviation Battery: 9V battery (not included) Size: Approx. 10*5.3*2.5cm\/3.9*2.1*1 Shipping color: white Quantity shipped: 1