1.[2-IN-1 DESIGN]: This water tank & dust bin allows your bObsweep robot to vacuum and mop simultaneously or separately, giving you versatile cleaning options for various surfaces in your home. Simply fill with water for mopping or use dry for standard vacuuming - perfect for tackling different cleaning needs without switching attachments. 2.[COMPATIBLE WITH MULTIPLE MODELS]: Specifically designed to fit bObsweep RC400, Dustin, Orb-i, and Ultra-Vision robot vacuum models. This replacement part integrates seamlessly with your existing device, allowing for continued optimal performance without purchasing a machine. 3.[LARGE CAPACITY DUST COLLECTION]: The spacious dust collection compartment effectively captures more during cleaning. This reduces the frequency of emptying and maintains consistent cleaning power throughout your robot's operation cycle. 4.[EASY INSTALLATION & MAINTENANCE]: Quick and simple to install without tools required. The tank easily detaches for emptying and cleaning, featuring a washable filter that helps maintain your robot vacuum's suction power and extends the life of your cleaning system.