Friendly Robotics RL800 Robomower. I used this in Nebraska for about 10 years, and brought it with me to AZ, where my yard has no turf. It works really well, and has just one season on a new set of batteries.
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The unit works much like the robo vacuum cleaners. You just bury a perimeter wire an inch or so down or stake it below the top of the grass blades, and the mower makes repeated passes across the lawn for 2 or more hours. Bumper system causes the mower to reroute when obstructions are encountered.
Includes everything needed- perimeter wire, controller, charger, and manual.