PERIPHERALS MAKER Genius has this Ring Mouse product that is worn on the finger like a ring and is designed for use during business presentations or working on a laptop.
It uses a 2.4GHz wireless radio for communications with the laptop and has a touch-operated, clickable trackpad for scrolling with the user's thumb.
It's compatible with all flavours of Windows and comes with a USB recharger that is said to last for a month between charges. µ
kind of like this, except i use a 6 button mouse, so,...