Shelly Plus Smoke (the Device) is a smart photoelectric smoke alarm, which is effective at detecting slow fires that smolder for hours before bursting into flames. Sources of these fires may include burning cigarettes left on couches or bedding. Weight & dimensions Depth: 86 mm Height: 3.39 mm Power Power source: Battery Battery voltage: 3 V Battery life: 5 year(s) Number of batteries supported: 1 Battery type: CR123A Compatible battery sizes: CR123A Operational conditions Operating temperature (T-T): 0 - 55 °C Operating relative humidity (H-H): 30 - 95% Packaging data Quantity per pack: 1 pc(s) Features Detector type: Photoelectrical reflection detector Interconnectable: Yes Connectivity technology: Wireless Product colour: White Best uses: Home, Office Bandwidth: 2400 MHz Housing material: Plastic Suitable for indoor use: Yes Light alarm: Yes LED indicators: Yes Maximum range: 30 m Mounting type: Surface-mounted Placement supported: Horizontal Product life: 10 year(s) Easy to install: YesVisa merVisa mindre