Robot lawn mowers take a very different cutting approach to that used by petrol mowers.
A single cutting disc or sometimes several small cutting blades hang from a floating deck, which allows for height adjustment.
You can easily adjust the height using the dial on the mower or some models allow for remote height adjustment from the control panel or a mobile app.
Robotic lawn mowers tend to cut the grass very finely using extremely sharp energy efficient blades.
This kind of cutting technique makes for a neater cut, does less damage to the grass, and also generates some fine grass cutting mulch which will feed your lawn as it breaks down.
The regular, frequent cutting favoured by robot lawn mowers will keep your lawn looking much greener and healthier than traditional mowing techniques.