The Grip 300 by Turtle Beach uses an Optical sensor from Avago, specifically the A3050, providing a DPI/CPI range of 500 to 1750 DPI. It uses a USB connection.
The Turtle Beach Grip 300 optical gaming mouse is an affordable, ergonomically engineered 5-button scroll-wheel mouse that uses quality components such as the Avago 3050 optical sensor and Omron switches to deliver smooth, precise control. Its compact sculpted body sports an illuminated logo and scroll wheel, and hardware switches to adjust DPI from 500 to 1750 and polling rate from 125 to 1000Hz. Plug and play for both PC and Mac right out of the box, there are no drivers to load or software to run. And its non-slip soft-touch coating enhances grip control and increases gamer endurance.