1. Recovery tank with water level sensor, the vacuum motor will auto-stop work comes when the tank is full of dirty water.
2. Built-in design Vacuum motor and silencer way, quieter and more comfortable.
3. Ergonomic handle, humanized design, meet different heights people.
4. The side-dump sewage tank lurch design, operate easier and convenient.
5. Opening design sewage tank.
6. Oversized mouth water injection, water injection faster and more convenient.
7. Enabling overload protector location optimizations, more reasonable, easily observe to judge and restore its function.
8. Adding the visual window, for brush cover it is easier for brush installing and disassembly.
9. Add pressurized brush feature. (Nonadjustable)
10. Double universal wheel, more durable.
11. The side clean water, it is more convenient to use and maintenance.
12. Installed water level indicator, easy to observe the water level.
13. The external suction pipe, its humanized design increases the convenience of cleaning.
14. Eco mode (S510B PRO), longer working hours, less noise.