motor vibrations alarm will be issued and the backlight of display turns to red for warning. Parameter Setting: Support auto power off (APO) setting, low limit alarm (LAL) setting, and high limit alarm (HAL) setting. Auto shutdown time default 10 minutes(can be set closed). Alarm value setting ranges of 0-1000ppm. Wide Applications: It can detect a variety of gases, such as natural gases, gases, liquefied gases, fuel oil, coal, etc. incomplete combustion to produce carbon monoxide concentration detection. Application Scenario: Suitable for evaporate heating room, garage confined space, gases water heating device, gases for cooking, etc. Specifications: Name: Carbon Monoxide Detector Material: plastics Battery: 3 * 1.5V AAA Alkaline Battery (not included) Ranges: 0~1000PPM Resolution: 1PPM Basic error: 10% (relative error) Warm-up time: 30 seconds Response time: 60s Recovery time: 60s Zero point drift: 0-3PPM Sampling method: diffusion type Alarm value, correction: two-point field correction Operating voltage: 4.5VDC Operating time: ＞14 hours Display: LCD display with backlight Direct readings: real-time sensor concentration readings, battery power Alarm settings: low alarm function, high alarm function settings Alarm: sound, backlight LED color switch, vibrations indication alarm, working voltage undervoltage indication Audio alert: The higher the beeping frequency, the higher the concentration Applicable temperature ranges: -10 to 50 Applicable humidity ranges: <95%RH (non-condensing) Item size: 130 * 69 * 27mm / 5.12 * 2.72 * 1.06in Item weight: 135g / 4.76ounce Package size: 150 * 100 * 50mm / 5.91 * 3.94 * 1.97in Package weight: 150g / 5.29ounce Packing List: 1 * Carbon Monoxide Detector 1 * Guideline