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The ZM-GM4 - Knossos by Zalman uses a Laser sensor from Avago A9800, providing a DPI/CPI range of 800/1,600/2,400/3,600 dpi, Max 8,200DPI. This results in a tracking speed of 150ips, and a maximum acceleration of 30g. It uses a USB, Gold plated connection with a 1.8m, Braided cable. It weighs in at 135g grams with the cable, has 6 x 3.5g weights and is approximately 118 x 85 x 35mm (LxWxH).