Sony VAIO VGPWMS50  Wireless Presentation Mouse Optical - VGPWMS50

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As pictured

Good working mouse

Specifications:

 Type: Optical Sensor

Receiver Interface: USB
Sensor Resolution: 800 dots per inch (dpi)
System Requirements: Microsoft Windows XP Professional or XP Home Edition and integrated built-in Bluetooth functionality.
Dimensions: 2.8" x 1.5" x 4.6"
Weight: Approx. 4.3 oz. (including batteries)
Operating Length: 32ft. max.
Power Requirements: 3V DC (Two AA batteries)
Battery Life: Approx. 3 months - Two Alkali AA batteries (depending on the operating conditions)
Color: Black