12. Door opening indicator
Every time someone comes near it (from around 13 ft), the device’s panels will light up, warning you. Anyone who has ever gotten in an awkward situation when someone suddenly opened the door on them would probably like this item.
11. Desktop washing machine
How often do you wash tiny items like your watch or glasses? Japan has invented a portable washing machine that will clean your belongings in 2 minutes. You just have to plug it into a computer or any other device with a USB port, add water, and switch it on.