OCIA.net takes a look at the Logitech G7 Cordless Laser Mouse in their latest review.

The USB dongle is similar in size and shape to a USB flash drive. The G7 communicates with the computer via this USB dongle, which uses a 2.4 GHz wireless frequency to send 500 reports per second to the computer. This should allow for a lag-free experience.

Logitech G7 Cordless Laser Mouse Review