The 2.4GHz wireless mouse BOMU-W24A/BL from Buffalo Corporation with 10m range with RF technology, no line of sight, digital security signature - 800 channel radio - works on the desk and in the air. The multi purpose 800 dpi mouse can be used for a variety of functions such as for presentation, gaming etc.The Buffalo 2.4GHz wireless Optical Air Mouse uses an advanced gyro sensor from Gyration Corporation USA. The miniature gyro sensor with its unique tri-axial vibratory structure offers high reliability, greatly decreasing drift and improved shock resistance.

The gyro sensor measures 13.8mm x 14.8mm x 13.3mm and weighs 6.8g. The mouse is compatible with OS Windows XP / 2000 / Me/ 98SE, Windows XP MCE2005 / 2004.The mouse can be charged easily with the bundled table lamp type charger. The Buffalo 2.4GHz wireless mouse BOMU-W24A/BL measures W130×H55×D45mm and is available for 19,780 Yen ($165).
Source - Buffalo (Japanese)