Get an alert on your phone when dangerous gasoline fumes collect in your boat's bilge. The new Life-Gard Mobile gasoline fume detector is battery powered and requires absolutely no wiring. Ideal for IOs. Installs in your boat's engine compartment with just four screws. Then download the free Fume Detector app to your phone (not available for android yet). Now your boat and its occupants are safer. Change the batteries once a year--12V boat battery adapter included. Sensor element never needs to be replaced and has a lifetime guarantee.