Precision meets modularity: Designed for maximum compatibility with digital electricity meters - ready for your home. The TTL head is attached directly to the optical interface of the meter with a metal disk and reads the data. The WIFI module can be flexibly attached up to 20 cm away using the supplied 3M adhesive pad - for optimum positioning and clean cable routing. Plug & play in the app: Once connected, immediately ready for use: The stromleser app not only evaluates your meter reading - graphically and numerically, live and clearly -but also guides you step by step through the installation. No scripts, no Tasmota - everything directly in the app.