The Gardena 2025 SILENO flex is an autonomous robotic lawn mower designed for residential properties up to 8,600 square feet (approximately 0.2 acres) and is capable of managing terrains with gradients of up to 35% (19°). Unlike satellite-guided models, the SILENO flex utilizes a boundary wire and guide wire system for navigation, providing precise perimeter control and reliable passage through narrow corridors. It is powered by an 18V (3.6 Ah) lithium-ion battery that offers a typical 90-minute mow time per 60-minute charge cycle. The mower features an adjustable cutting system with a 10-inch cutting width and a height range of 1.0 to 4.0 inches, which is among the most expansive in its class. Connectivity is managed via the GARDENA Bluetooth® App, allowing for remote scheduling and status monitoring within a 33-foot range. Additional technical features include an IPX-5 waterproof rating for hose-washable maintenance, SensorControl technology to adjust mowing frequency based on grass growth, a Frost Sensor, and a measured sound level of 60 dB(A).
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