FS-558/RF Wireless Optical Smoke Alarm The smoke alarm detects smoke particles and has a built-in temperature sensor to provide an early warning if a fire should occur. The advantage of an interconnecting smoke alarm system is that all smoke alarms sound at the same time, not just the one closest to the fire source. Comes with battery and plug and screw for mounting. - Easy to program with the self-learning system - Connect up to 12 units- Pause function - silence the alarm temporarily for 10 minutes- Signal at low battery voltage- Compatible with Nexa Bridge (control unit)- The smoke alarm closest to the fire source has a different alarm signal than the others which makes it easier to locate the fire- Dust protection included- User manual in Swedish and English is in packaging. Norwegian, Danish and Finnish user manuals are available at nexa.se- Declaration of Performance: NEXA13215-CPR-01 is available at nexa.se- Certified by Intertek; EN 14604:2005 Smart home functionUse the FS-558/RF smoke alarm with Nexa Bridge and you can easily create an automation that starts when the smoke alarm is activated. For example, a notification can be sent to the mobile, sirens can be activated or lights can be turned on. Technical dataPower source: 2 x AA (alkaline batteries) includedRadio frequency: 433 MHzRange: Up to 20 metersAlarm signal: 85 dB at 3 metersTemperature sensor: 54-70 °C (EN-54)Operating temperature: 5-45 °CHumidity: 10-90%Dimensions: Ø 120 mm (25 mm high)E number: 6301776Product document