The upper side is dominated by the two main buttons and the dented scroll wheel. Below the wheel there are two small buttons to change the sensitivity (one of them has a little ridge, so the user can identify it quickly by touch). Right on the upper tip of the mouse, above the scroll wheel, there’s a button to change the colors of the light scheme. Of course, all those functions can be reprogrammed using the configuration application.
Below all those buttons the user can see a small V-shaped area, full of tiny holes with LEDs under them that light up the Sentinel Advance II. In the middle of the V, there’s an OLED display that shows the number value of the current dpi setting for the X/Y axis and can also exhibit a small 32 x 32 pixels .bmp black and white graphic. The user can upload a clan logo (FPS players like to gather in virtual battalions called “clans”).
The underside houses the Avago ADNS-9800 laser sensor that reaches 8,200 dpi of sensitivity, the weighting system (with five separate 4.5 gm weights) and two long rubber feet. The cable is cloth-wrapped and ends in a gold-plated USB plug.