$ 700 
Specifications
Model: Nelson A9 MAX
Dust Box Capacity: 500ML
Water Tank Capacity: 150ML
Dust Collector: 1500ML
Battery Capacity: 5200mah
Highest suction power: 2700Pa
Sensor: 20 types of sensor
Navigation: LDS Laser
Head anti-card
Intelligent: Sweep and Mop, Path planning, Area cleaning, Save APP map
Map 4.0 Set no-go area
Continuation at interrupted point
Brush: Double side brush
Floating: central brush Running
Noise: 55dB Adjustable
Climb Capability: 20mm
Power (W): 35W