- Compatibility: Works with all devices that use QCC1 or Type 1 connection on propane tanks from 5 to 40 pounds. - Color dial: Monitor fuel level without removing the tank. The color coded dial lets you see at a glance when the level is low, with three levels: gas, low gas, and refill. - Safety and leak detection: The tank gas level indicator includes a leak detection function; if a leak is detected, the instrument will limit operation to protect your safety. - Rugged construction: Made of brass to provide an airtight connection between oven, RV and tank; rugged and reliable. - Use scenarios: - On RV trips or camping, to safely monitor propane while cooking and avoid tank overfill or empty conditions. - At outdoor grills or stoves in campsites or home setups using 5-40 lb tanks, enabling fuel level awareness without removing the tank. - In small kitchens or other propane appliance configurations where a secure, airtight connection and leak safety are important.