""Overview: This item is a fire alarm siren, it must be used with the alarm host. When the alarm host detects a fire, it triggers the alarm siren. The siren will emit a loud sound and a quick light to remind people to escape the fire. It is suitable for use in offices, shops, hotels, restaurants, etc. features: * Three different tones, you can choose any of them according to your needs. * Its super loud, the alarm volume is up to 100dB. * The integrated 2pcs LEDs, very bright when sending the alarm signal, effectively remind people to flee the fire. * The siren will emit a loud sound and a quick light to remind people to escape the fire. * Use of high quality ABS fire-resistant material. Suitable for use in offices, shops, hotels, restaurants, etc. Characteristics: Nominal voltage: DC 12V Nominal current: 100mA Voltage range: DC 9-24V SPL alarm: up to 100dB Tone adjustment: Three tones Material: ABS The Red color Working temperature: -10Celsius- 50Celsius Item size: approach. 12.3 * 9.7 * 4.8cm (L * W * H) Item weight: approach. 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 * support 1 * bag of mounting screws 1 * User Manual ""