Function: Powers off and restores the alarm; emits audible alerts for power failure and power restoration. 118 Decibels: Produces a 118 dB siren sound that continues until manually silenced or battery is depleted. LED Indicator: Flashes to indicate power loss; LED activates only when power is interrupted. Manual Control: Alarm can be manually silenced after activation. Power Supply: Requires one 9V battery (not included). Operating Voltage: 110–220V AC. Plug Type: US standard plug — compatible with outlets in Canada, Mexico, Thailand, Taiwan, Philippines, and other regions using US-style sockets. Input Voltage Range: AC 100–240V. Quantity: 1 pack. Color: White. Material: Plastic. Package Contents: 1 × Power Failure Alarm. Note: Actual product color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.