DEVICE -- The sound and light alarm is an alarm terminal designed for sound and light alarms in the event of a fire. Two-wire system for wiring. The main line is terminated on two main lines and the power is connected to the 12/24VDC power line. ALARM SOUND & LIGHT -- The siren emits a loud sound and flashes quickly to remind people to escape; high brightness and high decibel can attract attention and protect people from harm. OPTIONAL ALARM SOUND -- With three different tones, you can choose the tone you like, the sound of ambulance; Police Car Sound II; Fire Truck Sound III. EASY TO USE -- This security alarm is easy to use and has great practical value. It can be applied to areas where safety warnings are required in hotels, factories and apartments. QUALITY ASSURANCE -- If you have any questions about purchasing our products, or if you have any questions or problems of use, you can always ask them. We will answer all your questions. Product Description Sound and light alarm Widely used 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: 20mA/50mA Flash Intensity: 1.2Ws Flash Period: 1.5S Audio Alarm: 105Db Lifetime flash light output: 40,000 (hour) Size: 134 x 115x 48mm/5.3 x 4.5 x 1.9in (L x W x H)