MOSUO Smoke Detector 10 Year Battery Smoke Detector Battery Powered 3V Not Hardwired Complies with UL 217 Smoke Alarm for RV Home Garage Guard Deaf People Camper Hearing Impaired Model 731

The alarm features a horn tone that has a lower and varying frequency. This makes the alarm easier to hear for the elderly and those with mild hearing loss. Product Highlight: ? ETL Listed ? 10 years battery life. ? Single test/silence button. ? Meet UL217 standards. ? Easy to install and test. ? Equipped with end of life signal chirp. ? Complies with all current 10 year legislation in U. S. states and cities where required. Function Description Normal: 1 green led flashes, 1 minute pause Smoke Alarm: 3 beeps with 3 red led flashes, 1.5 seconds pause. Low battery: 1 chirp with 1 yellow led flashes, 60 seconds pause, Please replace alarm. Trouble: 2 beeps with 2 red flashes, 60 seconds pause. Please replace alarm. End of life: 1 red flashes, 10 seconds pause, Deactivate and replace alarm. Technical Specs: Smoke Sensor Type: Photoelectric Working temperature?-10?~+50? Alarm sound: ?85dB (3 meters) Relative humidity: ?95%R.H. Smoke sensitivity: 1-3%ft Alarm mode: Siren with flash (Buzzer Red LED) Package Contents: 1 × Alarm Unit 1 × Mounting Bracket 2 × Screws 2 × Anchor Plugs 1 × User Manual 2 × Safety Stickers Note: Clean alarm monthly. Test weekly. Avoid extremely dusty, dirty or greasy areas. Instructions labels on the device, you don’t worry about losing user manual or instructions. Smoke Detector 10 Year Battery, Smoke Detector Battery Powered 3V (Not Hardwired) Complies with UL 217 Smoke Alarm for RV, Home, Garage, Guard, Deaf People, Camper, Hearing Impaired