LED Wireless Display for Pro & UniversalFor those who are not smart device users, the Mopeka Check LED Display works with two Mopeka Check sensors (Pro or Standard) and allows you to monitor the levels in two separate propane cylinders. Programmable for 20, 30, 40, and 100 lb cylinders. Each side is independent and thus may be programmed for different sizes. Power: CR2032 Battery. Specifications:Type: PartsBox Dimensions: 1″H x 3″W x 4″L WT: 0.02 lbs