Fourmodel universal compatibility: compatible with V8, V9B, V9P, and V11. The snapon interface is tool for quick installation and removal. It works with all suction levels and cleaning modes of these models with no compatibility errors. Efficient cleaning on multimaterial floors: 27 cm wide suction port with a soft velvet roller brush and nylon bristles. Suitable for solid wood floors, tiles, and shorthaired carpets, delivering a 32% increase in cleaning efficiency. Silicone antiscratch floor protection: 1.3 mm silicone antiscratch strips run along the edge of the brush head to prevent scratches on solid wood floors and marble. The soft velvet roller brush is antistatic. Antientanglement and easy maintenance: builtin spiral cutting teeth on the roller brush automatically cut entanglement. The roller brush is detachable for water washing. Durable stainless steel bearing provides an estimated lifespan of 34 years. Use scenarios: Daily cleaning in homes with a mix of wood and tile floors (kitchens, living areas) to improve efficiency and coverage. Households with pets or shorthaired carpets where quick hair pickup is beneficial. Cleaning along baseboards, under furniture, and in tight corners where entanglement risk is higher.