Product Feature High-tech sensor High accurate electrochemical sensor(the most accurate CO sensor) infrared photoelectric sensor(the bestsensor to detects smoke while minimizing false alarms) LCD concentration PPM Easy to Install Battery Operated for Convenience 3*1.5V AA dry battery (package notinclude) -After installing 3 batteries, you can hear the sound of "di", and it starts working normally after 2 minutes. In operation, it displays nothing with a power-saving design. Ultra-long standby time, low current consumption -Press the button “test”, smoke and carbon monoxide detector alarms ≧85db, loud enough to alarm you the dangers no matter you’re asleep in the bedroom or watching TV downstairs. -So easy to install on wherever you stay for long periods: drill the two marked installation holes. Tap the two plastic grommets into holes with a hammer. Mount the bracket to the ceiling by inserting and tightening the supplied screws into plastic grommets. TIPS: Please install the sirens at 0.3~1m below the ceiling because the concentration of carbon monoxide and smoke is smaller than that of air. Sound & Flash Alarm& LED indicating Alarm Combo Detector You can save money by buying a co smoke alarm while keeping yourself safe. Specifications Item size 4.7 x4.7 x 1.8 inches Item Weight 6.4ounces accessory products main engine×1、Instructions×1、Screw( installed on the wall)×2 rubber stopper×2 (tips: it is without 3*1.5v AA dry battery）
- Smoke and Carbon Monoxide Detector Beeping once Detecting These Two Gases.
- Smoke Co Alarm Detector Using High Accurate Electrochemical Sensor Alerts you to Carbon Monoxide Danger, and Photoelectric Sensor Detects Smoke While Minimizing False Alarms. Insurance Safety of your Life.
- 3 Pieces AA Battery - Powered Smoke Co Detector. Easy to Install. It Will Mind You Up To Change Batteries With Continuous Beeping Every 30 Seconds When The Power is Close to Run Out. The Low-Level Blink Indicator Shows it's Working.
- Apply for All The Place to Produce Smoke And Carbon Monoxide, Such as Kitchen, Bedroom, Hotel, Apartment, Market. Also Useful for BBQ Situation, Using Charcoal Warm, Garage, etc.
- 100% Customer Satisfaction Guaranteed. 5 Years Warranty. Risk & Hassle Free!