Ultra smart, ultra sound stain remover pen.
You dampen or put detergent on a stain and apply with a brushing motion for a minute, the tip vibrates at 50000 times per second.
You can see the water vaporising as the droplets are shattered by the vibrations.
This activity breaks up the stain, shaking the particles from the fibres at a microscopic level, where it does no damage.
The broken up stain can then be rinsed away.
A handy 9 inch, Ultra Sonic Stain Remover works with 4 x AA batteries or your own multivoltage adapter.
Also works as a jewellery cleaner by agitating the water in a small container.