Smoke Detector, GuardryShely Fire Alarms Smoke Detectors with Photoelectric Sensor, Smoke Detector Battery Included with Silence Function and Low Battery Signal, Fire Alarm GW206C for Home, 4 Packs

ADVANCED PHOTOELECTRIC SENSORS: Ditching the traditional ionisation sensor, the advanced photoelectric smoke detector GW206C owns an average response time of 15-50 minutes faster than ionisation ones, enabling faster detection and alerting of smoke.
10 YEAR LIFE SMOKE DETECTOR: The extra long 10 year standby life saves you the hassle of frequently replacing your smoke alarm with a new one. The fire alarm is equipped with a 1 year life replaceable battery, when the battery runs out of power, replace it with a brand new one to bring your alarm back to life!
TEST/SILENCE FUNCTION: Weekly testing via the test button ensures your smoke detectors are working properly and efficiently. When smoke from cooking or bathing triggers the alarm, press the silence button to get 8 minutes of silence.