Flame King Smart Wireless Propane Tank Scale - Bluetooth Gas Gauge with App Connectivity for BBQ and Grills Monitors Multiple Propane Cylinders - 20/30/40 lb Tanks Description Features: ALWAYS HAVE PROPANE READY: Dont worry about running out of propane again! With this digital gas indicator, you can track and monitor the levels of your large or small tank, so you never run out of gas in the middle of a good barbecue! WEIGHS & MEASURES MOST GAS TANKS: Get the most accurate measuring of weight! Track and monitor the gas levels of most propane gas tanks. SMART TECHNOLOGY APP: Monitoring your scale with your mobile phone is easy with the help of our Smart Scale app. Our app ensures that your device is connected to Bluetooth and it allows you to wirelessly track propane levels. Smart Scale App is now FREE for 20, 30, and 40lb propane tanks. LONG-LASTING BATTERY OPERATED: The red LED indicator illuminates during connection and is NOT a power light. Our scale can last for 3 months and over A YEAR if connected to our app. This device requires 2-AA batteries (not included). VERSATILE & MULTIPURPOSE: Use this scale to weigh and measure multiple gas tanks for barbecue grills, patio heaters, and RV campers. A high-quality construction makes it durable while lightweight materials make it easy to store and transport. Product Details: Product Dimensions: 12 x 12 x 2.5 inches Item Weight: 14 ounces Manufacturer: YSN Imports Country of Origin: China Item model number: YSN-PS1