Description: Material: plastic. Size: 10 x 5.3 x 2.5cm. Cable length: 1m. Conversion Time: Less than 0.5 seconds. Power Supply: 9V laminated battery(not included). Monitoring of Power: AC 110-220V. Alarm Volume: 120dB. Color: white. Features: * The siren alarms when the power supply is cut off until restore power. * The siren could be munual silenced by on/off switch. * With indicator indicates the power condition. * High voltage resistant design, works fine even when grid voltage exceeds bid. * Drawer cell cover design, can easily change the battery. * Widely used in industrial and mining enterprises, organs, substation, freezers, livestock and industrial controls that cannot be without power. Package include: 1 * Power Cut Alarm. Silencing and test button, multiple settings for different behaviors Prevent the thief cut off power supply for theft and so on If there is a sudden power (power), the alarm will sound the alarm to remind people Automatic closing alarm function when power supply