1The large screen LCD is displayed in real time, allowing you to view the gas concentration and device status at any time. 2Unlike the traditional ones, the WIFI intelligent alarms are not only emitted on the spot, but also push the situations to notify the users on phone APP and the cloud server. 3Equipped with two screws, which is easy to install and operate to save your time. 4This natural gas alarm has high sensitivity, high stable and longlived features, which can meet your needs well. 5This natural gas alarm is a perfect replacement for your old one you can directly replace the old or broken one. Item Type: Gas Detector Material: ABS Product Model: S200-GAS Power Voltage: US AC 100-240V Work Current:1 x GasDetector 1 x USB Cable 1 x Plug 2 x Screw 2 x Expansion Tube 1 x Paper Pad 1 x Manual Do not install it next to exhaust fan or the ventilation pipe.