Product Description: LB1200 Lawnbott. Features: The Lawnbott LB1200 Spyder is the world's first robot mower that doesn't use a perimeter wire to operate. Patented sensors actually 'sense' when the LawnBott Spyder is over grass to cut, reversing direction when over walkways, curbs, patios and mulched areas. Its perfect for smaller lawns bordered by solid surfaces like asphalt, concrete, beds or solid barriers. Now even courtyards and roof top gardens can be mowed easily. Simply put it the LB1200 down and press a button! Unique Features: * Autonomous (automatic) Mowing * No Wire Required! * Includes Charger * "Push" Sensitive Obstacle Detection * Mows up to a 27 degree grade * Lithium Ion Battery * Weatherproof * Compact * Quiet