You may consider this one instead.

Highlights:
Now you can wear your mouse! Wear your mouse as a ring!
It is 3 dimensions and now you can always put your hands on the keyboard, as you can wear your mouse on your finger and let the keyboard as a mouse pad for this USB 3D Finger optical mouse.
What's more? It is wireless using 2.4GHz giving you absolute freedom!

Features:
- Wireless, using radio frequency, absolute freedom!
- Compact: around 1/2 to 1/3 of conventional mouse.
- with 3 different ring sizes to fit for different people with different finger sizes
- High Resolution: 1000dpi
- Optical, making it working on all surfaces.
- USB Interface
- Powered by internal battery and rechargeable by USB (USB cable included)
- Plug-N-Play, no need for driver installation.
- Ergonomical design
- Power-saving: power off if no moves are detected after a while.
- Long Working Distance: 15 meters approx.

Specifications:
- Dimensions: 60x40x38 mm approx. for Mouse
- Dimensions: 72x17x8mm approx. for Receiver
- Net Weight: 25g approx.  for mouse & 10g approx. for Receiver
- Build-in lithium-ion battery: 3.7V 230mA
- Charging time: 2 hours approx.
- Continuous using time: 14 hours approx.
- Stand by time: 170 days approx.

Recommends for:
- Presentation
- in some environment where a flat place for a conventional mouse is not available
- in-flight, train, car... where you hand cannot rest on

System Requirements:
- Windows 98 / 2000 / XP / NT / VISTA

Option: Color
- Black
- White (Out of stock)

Package Contents:
- USB 3D Finger Optical Mouse x 1
- USB Cable x 1
- Finger rings (different sizes) x 3
- Wireless Receiver x 1

Note:
- The inner diameter for the 3 finger rings are: 15mm, 17mm & 19mm approx. respectively while the outer diameter is 18mm, 20mm & 22m approx. respectively.

Reviews:

Peter Kehl