Power failure, LED high volume, detection alarm for home automation kits. Features: 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 silencedwith 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. 1. Alarm mode: The whistle alarm can be soundedwhen the power grid is cut off or the power supply wire and cable is cut, until the power supply is restored. 2. Monitoring voltage: AC175V265V. AC/DC3V48V, 380V and other voltage products can be customized. 3. Working voltage: DC9V (1 GF22 battery). 4. Alarm volume 115 decibels. 5. Power indicator light: It can make the power supply status of the power grid clear at a glance. 6. High-voltage resistance design: professional circuit design can work at 260V for a long time, even if the grid voltage exceeds the standard in the middle of the night, it is not easy to be damaged. 7. Wide monitoring voltage: AC175V ~ 265V, which has a wider range of applications, not only in cities and towns, but also in remote villages where the power supply voltage is extremely unstable. 8. Automatic charging: Built-in trickle automatic charger, which can use both ordinary batteries and rechargeable batteries. 9. Battery life: ordinary battery 2 years in standby state, rechargeable battery 10 years. 10. Battery undervoltage alarm: It can prevent the missed report accident caused by the failure of the battery which is not found. 11. Replacing the battery: The drawer type battery cover is convenient to switch, and the battery can be easily replaced. 12. Working environment: temperature -30+60, relative humidity 85% RH. 13. Volume: 55*22*80mm. Note: The product does not include batteries Delivery Quantity: 1 Piece Package Contents: Only the above package contents, excluding other products. Size: 55*22*80mm (Reminder: The size is measured by hand, please allow 1-2 cm measurement error) color: White (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.) WUZHOU