Adjustable suction power and lower noise.
The robot is with memory to know where has cleaned while where hasn't thus one-time sweeping coverage is more than 98%. The cleaning path repetition rate is about 1%.
The robot can detect the entire environment around and then build up the map inside the CPU so that it do cleaning with plan from one room after another.
Anti-fall system to detect stairs to avoid falling.
Modulized design is convenient for end users to maintain the robots by themselves.