The LawnBott navigates partly through GPS and a series of grass-detecting sensors, but you also need to bury a guide wire around the perimeter of area you want it to mow.
Updated:Caption:Rich BrownPhoto:Colin West McDonald/CNET
The LawnBott LB75DX, pictured here, is an older model that lacks app support and the third row of wheels, among other things. The two can share a charging station and guide wire, set up. They will both return to the station automatically when their batteries run low.
Updated:Caption:Rich BrownPhoto:Colin West McDonald/CNET
The LB75DX model is designed to mow a quarter acre. The LB85EL will mow up to just under three-quarters of an acre. Both units will require multiple passes to mow an entire lawn, though, so there's no way around interacting with the scheduling function.
Updated:Caption:Rich BrownPhoto:Colin West McDonald/CNET
