Husqvarna AUTOMOWER 315, Robotic Lawn Mower (Install Kit Sold Separately) Efficient robotic mower works for a variety of mid-sized lawns, cutting up to 1/3 acre of grass Smart navigation works within boundary wire and returns to charging station when needed Works in rain or shine Handles slopes up to 40% and narrow passages with ease Theft detection PIN code and alarm Lift sensor stops blades if mower is lifted Intuitive menu system allows personal settings to schedule the machine to mow Husqvarna Automower 315 must be purchased with Install Kit