Newest 2 in 1 LED Digital Gas Smoke Alarm Co Carbon Monoxide Detector Voice Warn Sensor Home Security Protection High Sensitive Features: 1.2 in 1 Carbon Monoxide+Smoke Detector 2.Adopt high reliability electrochemical sensor and infrared photoelectric sensor 3.LED liquid crystal display density 4.Carbon monoxide gas detection concentration: 000-999ppm 5.Smoke sensitivity: 0.1% db/m-9.9% db/m 6.Power: 3 AA1.5V batteries (Not included) 7.Low current consumption, long standby life 8.Battery low battery prompt 9.Alarm memory function 10.Alarm pause (silent mode) 11.Double warning :Sound and light alarm / LED indication alarm 12.Sound Alarm:100db 13.SMT industrial manufacturing, strong stability 14.Size: 104mm (diameter) * 35mm (height) 15.Material: plastic 16.Color: White 17.Smoke detector protection area: When the space height is 6 meters to 12 meters, the protection area of one detector is 80 square meters for the general protection site; when the space height is 6 meters or less, the protection area is 60 square meters. 18.Scope: barbecue shop, kitchen, bedroom, living room, parking lot, school, library etc. What is Included 1 x Carbon monoxide smoke composite detector 1 x User's Manual Smoke detector alarm Features: 1.Smoke detector alarm 2.Alarm volume: 10 feet to 85 dB 3.Round Size: R = 102mm, H = 31mm 4.Powered by 9V battery (Not Included) 5.Usage: Fire, Smoke 6.The detector is suitable for detecting the smoke in home, room, shop, hotel, restaurant, office, school, bank, library, computer house, storehouse and etc. 7.Alert and warn people stay far away from danger field when it detected smoke. 8.The detector adopts the special structure design and ASIC, has the dustproof, mothproof and anti outside light interference feature etc. NOTE: The smoke alarm is less sensitive and requires a smoke maze to trigger the alarm. If testing is required, the test needs to be simulated in a closed, real smoke environment. What is Included 1 x Smoke detector alarm 2 x screws