Size:4.96 x 4.96 x 1.89 in Material:ABS Type:Fire Alarm Decibel:105dB,Three adjustable pitches Powered:Connecting wires Package:1*Hardwired fire alarms Q1: What is this fire alarm designed for? A: These fire alarms are designed specifically for professional fire protection use, combining high-intensity strobe lighting with a powerful audible alert. As reliable fire alarms, they rapidly deliver emergency signals during a fire, helping occupants respond quickly and safely in critical situations. Q2: How loud is the alarm sound? A: The fire alarms produce an alarm volume of 105dB or higher, ensuring immediate attention within seconds. Even in noisy environments such as factories or shopping centers, these fire alarms maintain strong sound penetration for effective emergency notification. Q3: Do the fire alarms provide visual alerts as well? A: Yes, these fire alarms feature a built-in high-brightness flashing LED strobe. When activated, the sound and light work together to enhance visibility and awareness, making the fire alarms highly effective in smoke-filled or low-visibility environments. Q4: Are different alarm tones available? A: The fire alarms offer three selectable alarm tones, including fire truck sound, ambulance sound, and standard alarm sound. This flexibility allows the fire alarms to adapt to various public and commercial settings while improving alarm recognition. Q5: How are the fire alarms powered and installed? A: These fire alarms operate on 12V/24V power via connecting wires. Installation is straightforward—simply connect the on-site wiring to the terminal board and secure it with screws. The compact 4.96 x 4.96 x 1.89 inch design allows easy placement of fire alarms in different buildings. Compact 4.96 x 4.96 x 1.89 inch fire alarms for commercial and public buildings105dB high-decibel alert ensures fast emergency awareness with fire alarmsSound and strobe combination enhances visibility and response speed of fire alarmsThree adjustable alarm tones improve identification and safety efficiency12V/24V wired power design delivers stable, easy-to-install fire alarms