On the same side we can locate the profile selection LEDs; these will work only if Hardware Playback option is used:

The left corner also comes with two extra buttons, which are initially programmed for DPI up/down operations:

The scroll wheel, also made from aluminum, is rubberized and is located between the two Omron left and right click switches, which are guaranteed for about 8 million operations:

The mouse comes with the Avago ADNS-9500 LaserStream Gaming Sensor, which allows us to adjust the DPI in 100 unit increments, has surface quality detection, 1ms response rate, motion detection at 150ips and acceleration up to 30G. The large aluminum plate gives the product an industrial look and the PTFE Glide Pads ensure that the mouse movements are as smooth as possible:

The 1.8m mouse cable is braided for additional durability; this one also comes with a Velcro tie for cable management:

For a perfect contact, the manufacturer has used a connector with gold plated contacts:

Compared to the ROCCAT Kone[+], the M90 is a little bit smaller:

With the mouse connected to the computer, we get to see the LEDs light up, which give the product an interesting effect:

On the back, the Corsair logo is illuminated with white LEDs:

Depending on the used profile, the LED on the left side of the chassis will light up accordingly:

While looking from the front, we can see that the DPI setting buttons along with the scroll wheel and profile select buttons are lighted up: