It has a matte black finish and rubberized sides for a firm, comfortable grip. The only RGB lighting zone is the illuminated Razer symbol near the back of the mouse, making the Viper Ultimate a more understated product in terms of bling. The Viper Ultimate, like the Basilisk Ultimate, has a compartment on the bottom of the mouse that houses the USB Type-A dongle for connecting to your computer. When not in use, you can charge the mouse using the included RGB charging dock or the detachable MicroUSB to USB Type-A cable. To accommodate the Viper Ultimate’s small form factor, some compromises were required. Unlike many other gaming mice, the CPI switch is located on the underside of the mouse rather than directly beneath the scroll wheel. While this prevents accidental clicks, it also means that on-the-fly CPI adjustment is not possible. The Viper Ultimate stands only 1.49 inches (37.8mm) tall, which may pose a problem for gamers with larger hands who prefer a palm grip. With so little real estate to cling to, the ring and pinky fingers naturally rest in a position that allows for far too many accidental clicks. The Viper Ultimate is ideal for users with smaller hands who prefer a claw grip. The Viper Ultimate is an extremely light mouse, weighing only 0.16 pounds (74g). Depending on who you are, this can be a blessing or a curse. If you prefer a heavier mouse, like me, you’ll find yourself frequently over or under correcting because the lack of heft introduces momentum. However, eSports pros who rely on motion economy will most likely have a better experience.
