Winter's coming and you're tired of guessing how much heating oil you have left? This Zuomeng smart gauge is about to make your life so much easier. Check your oil levels from your phone anywhere - no more freezing trips to the basement or outside to your tank! The coolest part? It comes with a repeater that boosts your WiFi signal, so no more dropouts even if your tank's in a spotty area. Uses some fancy detection tech that's more accurate than those old-school ultrasonic methods. Get instant alerts when oil gets low, and it even predicts how many days you have left based on your usage patterns. Fits most standard tanks with 2-inch NPT openings - works with 138, 220, 240, 275, 330, and 500 gallon tanks whether they're standing up or lying down. Comes with a Panasonic battery that lasts ages. Perfect for homeowners who want to avoid that panic moment when the heat suddenly stops working. Set it up once and you're good to go - peace of mind all winter long knowing exactly when to order more oil without over-ordering or running out.