🌬️ Digital Carbon Monoxide Detector Alarm with Display - GLBSUNION CO Alarm for Basement, Home, Kitchen, Bedroom, Living Room, Garage - UL 2034 Compliant - 1-Pack Review

✅UNIQUE DESIGN — Dimensions: 4 * 4 * 1.5 inch, Portable and easy installation. Precise electro-optical sensor, high consistency and stability, move, or in the same place for that. Loud enough and sounds good. 【✅NOTE: IN NORMAL CONDITION, LCD IS NOT LIT FOR SAVING ENERGY (ENTER THE STANDBY STATE, IT JUST LIKES OUR PHONES). LCD WILL BE LIT TO DISPLAY THE ACTUAL CONCENTRATION AS CO LEVEL EXCEEDS 30PPM OR AS THE TEST/RESET BUTTON PRESSED】. ✅ALARM WARNING — When a Dangerous level of Carbon Monoxide is detected, the Red LED will flashes and a loud alarm pattern will sound, Loud 85 decibel alarm with LED Flash While in the Alarm Mode for the Life-Saving Safety. ✅SAFETY AND VISIBLE— Protect Our Family from CO, With 3 digits LCD Displayer is Optional, 'Err' indicates the unit malfunctioning. 'Lb' indicates it low battery & need to replace. '999ppm' indicates CO level over 999ppm. ‘actual concentration’ when less than 999ppm. 【✅NOTE: IN NORMAL CONDITION, LCD IS NOT LIT FOR SAVING ENERGY (ENTER THE STANDBY STATE, IT JUST LIKES OUR PHONES). LCD WILL BE LIT TO DISPLAY THE ACTUAL CONCENTRATION AS CO LEVEL EXCEEDS 30PPM OR AS THE TEST/RESET BUTTON PRESSED】. ✅ENERGY-SAVING — Operated by 3 x 1.5V AA Batteries (not included), The alarm sound pattern is 4 beeps every 5seconds for the first 4 minutes. In 4 minutes, it will change to 4 beeps ever minute to save the battery. ✅ALARM STANDARD — 50ppm, alert within 60 to 90 minutes; 100ppm, alert within 10 to 40 minutes; 300ppm, alert within 3 minutes. Note: When you test the detector, please do not use gas blow the hole directly.