Detectable Gas -- The natural gas leak detector detects the main deadly gases: Natural gas (Methane, butane, ethane, LNG, etc) and Propane (LPG or liquefied petroleum gas). On-site Alarm and APP Remote Alarm -- This gas alarm can be connected with mobile phone APP in a wireless environment. After connection, you can always receive the information of the alarm when you go out and once the alarm occurs. High Precision -- The has an LCD screen that displays precise, real-time gas readings so that you know the exact gas concentration in the air of your home at all times. Installation Location -- This propane alarm has an long 6 foot power cord which allows you to install it in the exact ideal location in your house to allow for proper gas detection. Screw fix or paste installation.