Software

The Krypton 750 comes with its own lightweight software. All options are distributed across several tabs. The first one has button remapping to mouse, keyboard, media, and macro functions. The second page includes CPI adjustment for up to seven color-coded levels, at a range of 100 to 8000 and in increments of 100. Key Response denotes click latency and can be adjusted from 10 to 100 ms in increments of 1. Further options are polling rate adjustment (125, 250, 500, or 1000 Hz) and the ability to set x and y-sensitivity separately. Aside from setting polling rate within the software, the Krypton 750 also has a physical slider which allows for choosing between 125, 500, or 1000 Hz. When using the physical slider, the software sets polling rate to 125 Hz, but this setting does not get applied. Only upon hitting apply does the setting take effect and overrides whatever the slider is set to. The third page concerns lighting options and is detailed below. The fourth and final page has the macro editor. Lastly, profile management is available, too. When applied, all settings are saved to the on-board memory, so the software does not need to be running (or be installed) all the time. On my system, the software had a RAM footprint of 18 MB on average, which doesn't change when minimized to the system tray. Upon exiting the application, all processes are terminated, as they should be.

Lighting

The Krypton 750 has three physical zones for RGB lighting, which are the scroll wheel as well as the logo and strip at the back. Within the software, one can choose between Solid, Blinking, Pulsating, and Breathing lighting effects, which are further adjustable by defining color options: solid, shifting, or individual LED. Both brightness and colors can be set. By setting brightness to zero, the lighting can be disabled altogether.

Color accuracy and vibrancy are very good throughout. Here's a short demonstration video in which I go through the Prismo, Neon, and Stream lighting effects: