The Mopeka PRO+ Residential Cellular LTE - CAT - M1 is a sensor for steel propane tanks 48 inches tall or less, offering 99.5% accuracy and including 10 years of cellular service with no recurring costs. It provides once-daily cellular updates and works with the Mopeka Co-Pilot App for real-time monitoring and history review. The sensor features integrated temperature sensing, a tank "bubble level" indicator, configurable sample timing, firmware updates, and customizable alarms/alerts, with a battery life of up to five years.