Feature: 1. The sound and light alarm device is an alarm terminal device, and it is suitable for sound and light alarms when a fire occurs. 2. The two‑wire system is used for wiring. The main line is terminated with two main lines, and the power supply is connected to the 12 / 24VDC power line. 3. With three different tones, you can choose any tone you like. 4. Built‑in 6 LEDs, and the siren will emit a loud sound and a fast flash to remind people to escape the fire. 5. Convenient to operate and use, and it is of high practical value. Specification: Condition: 100% Brand New Item Type: Sound and Light Alarm Color: Red Temperature Range: -10℃-50℃ / 14℉-122℉ Humidity Range: ≤95%RH Operating Voltage: 12/24VDC Working Current: 40mA / 60mA Flash Intensity: ≥1.2Ws Flash Period: ≤1.5S Audio Alarm: ≥105Db Life of Flash Light: ≥40,000 (Time) Size: 134 x 115x 48mm /5.3 x 4.5 x 1.9in (Lx W x H) Package List: 1 x Sound and Light Alarm 1 x Instruction Manual