Advantages 1. Multi-angle rearview mirror, more convenient to clean the garbage. 2. AC motor, have good climbing capacity. 3. Double parking brake system, can hold on the slope. 4. Unique vacuum filtration system, dust absorption effect is better 5. With high voltage spray function, prevent secondary dust. 6. Can vacuum the garbage with 50mm diameter. 7. Long continuous working time up to 5 ~ 6 hours 8. Flexible configuration suitable for different places   Specifications