1. The roller brush can adjust the angle of rotation to sweep dust into the dust box and prevent hair from tangling. 2. It can be easily removed and replaced as part of daily maintenance 3. It is recommended to replace it every 2-3 months or according to your usage 4. Suitable for Xiaomi Mijia SCWXCQ01RR handheld vacuum cleaner 5. Size: about 235x55mm 6. Weight: 140 grams
