Copper bracelet. It is said to be good for wrist pain and muscle fatigue.
Mongolians use copper cups and items for its perceived health effects. Copper wristband.
If you get cramps in your hand after computer use, see its effects.
After some time of use, copper changes color due to reaction / oxidization. Then rub and wash it with kitchen detergents or sink cleaning detergents; it will shine again.
Price is about 9 euro. That includes shipment to any country.
You don't have to leave your home. It will be delivered to your address.