eufy Robot Lawn Mower E15 Check Before Purchase: 0.2 acres (8,700 sq ft) max mapping area. For grass under 3.5" and flat lawns (height difference under 1.2"). (Note: Not suitable for St. Augustine and dense Zoysia. Slope < 18°.) Hands-Free Auto Mapping: With V-FSD positioning technology, E15 comprehensively and accurately maps your yard and plans the mowing path, which can be easily managed on your smartphone. (Note: Subscribe to 4G data via the app for stable connectivity if your yard isn't fully covered by Wi-Fi.） Precise Obstacle Avoidance: E15's 3D perception system accurately detects obstacles, ensuring it avoids collisions in complex garden environments. Reliable Lawn Maintenance: E15 can achieve beautiful and uniform parallel cutting. Smart coverage detection system ensures no area is left uncut. Worry-Free Experience: E15 features GPS tracking to prevent theft. With easy app control and automatic recall during rainy or low-light conditions, it provides a seamless, worry-free experience. No Wires, No RTK, No Signal Issues: E15 utilizes pure vision FSD technology with high-precision cameras and intelligent algorithms, eliminating the need for wires or an RTK station.  eufy Blade Set Contains: Blade Set (9 Blades + 9 Screws) ×3. Quality Materials: Made of superior high-carbon steel for improved performance and smooth cutting. Recommended Usage: Replace every 240 hours for optimal performance. Note: Wear gloves when changing the blades. Use Official Accessories: Authentic eufy accessories extend the lifespan of your robot lawn mower and come with official after-sales support.  eufy Blade Set Contains: One blade disc and three screws. Excellent Cutting Performance: Enhance the efficiency of your robot lawn mower with better cutting patterns and exceptional smoothness. Recommended Usage: Replace every 2 years for optimal performance. Easy to Install: Remove the old screws, screw in the new blade disc shield, then attach the blades. Use Official Accessories: Authentic eufy accessories extend the lifespan of your robot lawn mower and come with official after-sales support.