These are really useful systems from both Stihl and Husqvarna - simply attach a sensor to your machine, and add the machine to your account ( through the mobile app or PC portal ) - you will easily be able to see all the data from there on.
The sensors from both brands are powered by a small battery and communicate via Bluetooth.
Husqvarna Fleet Service - Find out mower here
Stihl Smart Connectors - Find out more here