Overview: This item is a fire alarm siren; it must be used with an alarm system. When the alarm system detects a fire, the alarm siren is activated. The siren emits both a loud sound and rapidly flashing lights to alert people to evacuate. Suitable for offices, shops, hotels, restaurants, etc. Features: *Three different tones, selectable as needed. *Super loud sound, alarm volume up to 100dB. *Built-in 2 LEDs, super bright during alarm, effectively reminding people to evacuate. *The siren emits both a loud sound and rapidly flashing lights to alert people to evacuate. *Uses high-quality, fire-resistant ABS material. Suitable for offices, shops, hotels, restaurants, etc. Specifications: Rated Voltage: DC 12V Rated Current: 100mA Voltage Range: DC 9-24V Alarm SPL: Up to 100dB Tone Setting: Three tones Material: ABS Color: Red Operating Temperature: -10°C - 50°C Item Size: Approx. 12.3 * 9.7 * 4.8cm (L*W*H) Item Weight: Approx. 121g / 4.3oz Package Information: Package Size: Approx. 15.2 * 12.2 * 6.3cm / 6 * 5 * 2.5in Package Weight: Approx. 208g / 7.3oz Package List: 1 * Fire Alarm Siren 1 * Bracket 1 * Bag of Mounting Screws 1 * User Manual