GRUNDIG Rauchmelder 85 dB

In the event of an alarm there is an audible and visual indication. An acoustic 90 db sound from the internal siren will be heard and the light will blink. During the smoke alarm is alarming you push the test button it will be paused the smoke alarm for approx. 10 minutes. The red LED will still flash every 10 seconds it indicates the smoke alarm is working in the hush mode. Specifications Battery: 9v DC Operating temperature: 4-38 degrees Operating humidity: 25-85% Smoke sensor: Optical Alarme volume: 85db Hush status: Red Led flashes every 10s Alarm Silence 10 minutes Standby status: R ed LED flashes every 43s Low battery status: Beep every 43s Lifetime detector: 10 years