Lenovo Legion Precision Gaming Mouse, for Lenovo Legion Y720, Y520, Y530 Gaming Laptops, GX30J34225 8 programmable buttons 4 adjustable weight tuning cartridges (5g each) 1.8 meter braided cable; USB connection Pulsing backlight; Texturized finish for grip and comfort Adjustable dpi of up to 8200 dpi 1000Hz polling rate for ultra fast responsiveness Easy to use software change settings and preferences Designed for 20 million cycle clicks