A must have for every household. This inexpensive 5 piece value pack tool kit contains easy to use energy monitoring tools that can save you money, insure that you never run out of propane again and test all those batteries that may or may not be any good. Each TOOL KIT contains a Home energy efficiency thermometer set designed to not only save money but insure that food is refrigerated and frozen at the proper temperature and hot water is at a safe(prevent scalding) and cost efficient temperature. The Propane Gas Level Indicator is perfect for BBQ, Boat and RV use; it is magnetic, reusable and will automatically tell you if you are running low on propane. Simply apply it to the tank and read tank level as you BBQ. Empty tank - just remove and reapply to the new tank. The Household Battery Tester is a thin flexible strip (packaged in a convenient vinyl storage pouch) that lights up to indicate battery strength and will last for years. Eliminates the guesswork associated with battery life. Just apply the ends of the strip to the battery and read! The Household battery tester works with most common battery sizes: 1.5, AAA, AA, C, D 9v, and PP3. • Includes 1 refrigerator, 1 freezer, and 1 hot water thermometer, 1 battery tester, and 1 propane gas level indicator • Easy to use energy monitoring tools that can save money for every household • A must have for every household