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The ZM-GM3 by Zalman uses a Laser sensor from Avago A9800, providing a DPI/CPI range of 800 to 8200DPI. This results in a tracking speed of 150 ips, and a maximum acceleration of 30g. It uses a USB, Gold plated connection with a 1.8m, Braided cable. It weighs in at 115g grams with the cable, has 4g x 6 weights and is approximately 120 x 66 x 37mm (LxWxH).