The Clesse CompacTi electronic device slots into the back of the CompacTR800 OPSO Changeover and connects to the CompacTi mobile app via Bluetooth* to display when cylinders have run out of gas. Ideal for static holiday home owners, fleet managers, and cylinder suppliers to control their gas supply on their mobile device within range.* Fully featured Ti smart App - Connecting your Clesse product to mobile or tablet devices couldn’t be simpler when using the CompacTI App. Featuring an extensive application suite that allows possibilities to manage cylinders more effectively and conveniently. Individual users - Check the status of your CompacTi from the comfort of home & receive notifications when your cylinder needs exchanging, and order gas directly to your supplier from the app. Save Money on Gas