1 digital carbon monoxide detector (CO detector), battery operated

Features: Sensitivity/Alarm Time: Within 60 to 90 minutes at a CO concentration of 50 ppm; Within 10 to 40 minutes at a CO concentration of 100 ppm; Within 3 minutes at a CO concentration of 300 ppm LCD display (optional) : 4-digit LCD display Audibility: 85 dB (at 1 m distance), frequency 3 - 0.5 kHz Standby current: < 50 A Alarm current: < 50 mA Standby mode: green LED flashes once every 30 seconds Alarm mode: red LED flashes quickly 4 times with one beep every 5 seconds, then repeats, Low battery indicator: Beep every 30s when the battery is below 3.3V with the green LED flashing and Lb on the LCD Malfunction indicator : Beeps every 30 seconds with the green LED off and "Err" displayed on the LCD screen. Power consumption: 0.3 mW. Size: 11 x 4 cm. Powered by: 3 x AA batteries (not included). A perfect item to protect your family from the dangers of carbon monoxide. Advanced protection level, easy to read with the digital display, even in low-light conditions. Displays the carbon monoxide level detected by the device. Green LED: Flashes every 30 seconds to indicate that the device is working correctly. The green LED also flashes before CO measurement and when a button is pressed. Red LED: When a dangerous level of carbon monoxide is detected, the red LED flashes and an audible alarm sounds. carbon monoxide alarm is 4 short beeps, followed by 5 seconds of silence, followed by 4 short beeps with a corresponding red LED flash. This cycle will continue for 4 minutes, then change to 1 cycle every minute until until the device is reset or the CO is removed. The Test/Reset button is designed to test weekly if it is working properly and reset the device during CO alarm. Warns users when batteries are due be replaced. It is strongly recommended to mount this alarm on a wall surface. Compact, lightweight and easy to use. Specifications: Color: White Sensor: Electrochemical CO sensor Package Contents: 1 x Monoxide Alarm of carbon (CO) Battery not included