This device can be used with any computer including laptops; it plugs into the USB port and attaches to the finger with a ring like attachment.

From that position the controls are operated by the thumb, which is probably going to take a bit of getting used to, but once mastered it could be very easy and accurate to use. However there may be a bit of finger wobble if it does not fit to good, i.e. either too big or too small.

Features:

USB interface, Plug-and-Play, no installation needed.
No mouse pad is required, just slide on any surface.
Ergonomical design – reduce fatigue effectively
Real hardware resolution 1200dpi – better buy for professional designers and game fans.
Standard 3 buttons – left key, right key, scroll button included
Digital encoder technology, operate precisely, prevent faulty movement effectively
Textile coating cable (not rubber coating) – enhance free and easy movement

Specifications:

Operation voltage: DC 5V
Button dynamics pressure: 60g+/-5g
Dimension: approx. 60 x 30 x 25 mm
Compatible with MS Windows 98/2000/me/XP/Mac OS 9 and above

Priced at $10.

Source [Gadget Venue]

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