The LB3510 is the most sophisticated robot mower on the planet. User programmable for up to 4 working zones, the LB3510 also comes standard with a double capacity Li-ion battery to power this larger model, covering homes up to 1 ½ acres. Larger yards tend to have more complicated shapes, the LB3510 accommodates this by being able to program up to 4 different working zones, to maximize its cutting efficiency. Even smaller yards that may have narrow passageways from one area to the next, can take advantage of this feature. Safety and Security are further enhanced with the LB3510 through a higher sensitivity, free-floating, 360° bumper shell, rear-handle proximity sensor that stops the blade when touched, and an on-board alarm system should an unauthorized user pick up the LawnBott. Utilizing a double capacity Li-ion battery to propel more powerful motors, the LB3510 can handle slopes up to 25°. It can also maintain a larger yard area, up to 40,000 sq. ft. That’s well over a 1 ½ acre home’s typical yard size. No matter what your yard shape, size, or slope, the LawnBott has you covered!