PRO+ Residential BLE - LR for 48" Tall Tanks or LessThe PRO+ Sensor combines all the best technology of our ultrasonic sensing for the best sensor performance ever, using long-range Bluetooth communications to monitor tanks from the Mopeka App. Approximately 3x the range of a normal Bluetooth sensor, this sensor is ideal for tanks located a long distance from the house. It can also be used in conjunction with a MopekaIoT Wifi Bridge to monitor tanks when outside of Bluetooth range.*Should your tank have a horizontal seam along the bottom length of your tank, please see the Mopeka Seam Adapter for PRO+Features: LPG Tanks and Single-walled Non-Pressurized tanks: All steel LPG tanks up to 1000 gallons, horizontal or vertical cylinders; above ground only. Mounting: Mounts to the bottom by magnets. How to read level: Free Mopeka C0-Pilot APP on your smartphone or tablet. Power: 2 AAA (Energizer Ultimate Lithium only, included) Includes 1 Sonic Grease packet