Product Details: This product is a multifunctional carbon monoxide detector with a hytherograph, alarm, virtual flashlight, carbon monoxide imaging, and low battery alerts. Button Settings: For 3 seconds: turn the device on and off “” one press: temperature scale Time “-” one press: turn on the sound alarm Backlight: after 10 minutes of startup, it will automatically stop working, and when you press any button, it will be bright Alarm value do load adjustable setting: 10 to 500 pages per minute Technical data: Product Model: PTH-9D There is a range line: 0500 ppm Extended value: 5% or 10 ppm Resolution: 1 ppm Default alarm value: 150 ppm Personalized alarm sound for business: Yes Response time: less than 60 seconds Temperature range 0 5 /32 122 Operation Temperature accuracy: 1,5c/2,7 price f Temperature resolution: 1 pin/1 Humidity range: 20%80%r Permissible humidity accuracy: 5% Resolution for humidity: 1% Battery specification for function: lib-2400mah Lnpt: type-c, 5v/1a Product Size: 98mm x 90mm x 40mm Packing list: 1 * PTH-9D 1 * Instructions 1 * Colorful box 1 * USB Cable