I'm proud to present two robots:
-Solar Lawnmower robot:
Tired to cut your grass? you have just to press a button and the robot do the job for you. Once the job done and the robot stopped, it's internal battery is solar charged: no cost. The solar lawnmower robot is very quiet and make about the same noise as an electric razor!
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Tired to use mop to wash your floors? Throw away you mop: use mop robot, add a bit of water, some liquid soap and just press the button: the robot is stupid, slow, but it does the job alone and quietly.