The Bernzomatic digital fuel gauge indicates the amount of fuel remaining in portable propane tanks used with tabletop grills, portable heaters, lanterns, mosquito foggers and other propane-powered appliances. This pocket-sized device is easy to use whether you are out and about or in your garage. Designed with user friendly functionality. This digital fuel gauge is compatible with any non-refillable fuel cylinder with CGA600 connection, including 14 oz. Bernzomatic propane fuel, 16 oz. Bernzomatic propane camping gas and 14 oz. Bernzomatic MAP pro fuel.