On/off alert alarm with loud siren for power supply monitoring Function: Power off and restore the alarm, the sound of power failure and power-on alarm.<br> 118 decibels: 118 decibel siren sounds, keep the alarm until it is closed or the battery is exhausted.<br> LED light: LED flashing allows you to see alerts far . Flinting only when the power is turned off.<br> Manual control: You can manually turn off the alarm after receiving the alarm.<br> Power:1 section 9V battery (excluding)<br> Working voltage:110-220V<br> Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on.<br> Voltage:AC100-240V<br> Quantity:1 Pack<br> Colour:White<br> Material:Plastic<br> Package Contents:<br> 1 * Power Failure Alarm<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.