Adjustable suction power and lower noise.
Anti-fall system to detect stairs to avoid falling.
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.
Modulized design is convenient for end users to maintain the robots by themselves.