Jemay Combination Smoke and Carbon Monoxide Detector, Battery Operated Smoke Detector Carbon Monoxide Detector Combo with 10-Year Lifespan，Large LCD Display, Test/Silence Button, 1 Pack

[2-in-1 Protection] The smoke and carbon monoxide detector features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to concurrently detect the CO concentration and the larger smoke particles produced by smoldering fires
[Informative LCD] Large visual display unit, clearly indicates smoke warning and real-time CO concentration in the surrounding air, in addition to the remainder battery life and working status. To save power, it’ll activate only when the device is tested or the ppm has reached the alarm level for a certain period
[10-Year Replaceable Battery] The 10-Year lifespan fire and CO alarm is Powered by 3 AA batteries for simple installation, without requiring an electrician. The sustainable power of battery supplies for 10 years and features 3 reminder modes to permit you to know when they need replacing：chirp sound, indicator light, and LCD display
[Simple Installation] The smoke carbon monoxide alarm combo requires no rewiring and is easy to mount on any wall or ceiling without an electrician. The humanized design of the mounting bracket is suitable for the vast majority of screw hole pitches (30-92mm), no want to drill again
[Alert You to Danger] Three alarm mode: 85dB buzzer, LCD and LED Warning. When a threat is detected, the smoke and carbon monoxide alarm sounds a loud 85dB siren that may be designed to wake even the soundest of sleepers. Concurrently the sound alarm, the red light flashes and the LCD screen displays fire or CO icon