2-year warranty. Noise level: 63 dB. 3-nozzle wide-angle spray. All-around optimized three-nozzle wide-angle spray technology with wet mop for window cleaning. WIN-SLAM 4.0, efficient cleaning. The WINBOT W2 PRO OMNI has a brand-new, improved brushless motor, achieving up to 37% higher cleaning efficiency in combination with the intelligent WIN-SLAM 4.0 cleaning schedule. 10-level protection for greater safety. With the combined hardware and software support of the 10-level protection system, the WINBOT W2 PRO offers the highest level of safety and cleanliness when cleaning windows. Intuitive app control. The user-friendly ECOVACS HOME app is pre-set with multiple cleaning modes and features our brand-new omnidirectional remote control.