It can also be used with a 2.4GHz USB receiver. The keyboard connects via Bluetooth to up to three devices. Key functions can be programmed with Razer's Synapse software, though. Oddly enough, so are the backlight brightness controls. Also, secondary key functions aren't illuminated, meaning the symbols on the number keys and media controls are difficult to read. In between, however, the legends can be tricky to see. The same goes for when the LEDs are near or at their brightest and RGB backlighting can be adjusted. With the backlight off, the key legends are easy to read. There's no RGB LED lighting here like the company's gaming keyboards: The Pro Type has only white LED-backlit keys. The keycaps have a soft-touch coating, so you won't be tapping on straight plastic all day. (You can get an idea of what they sound like on Razer's site.) With 45 grams of actuation force, they're not so light that you'll make mistakes - and the mechanical keys don't require so much force that your fingers tire out. Razer's orange switches are tactile but not clicky, so you feel the actuation but they're relatively quiet you'll just hear a muted clack when the keys bottom out. But once you get used to it, you won't want to type on anything else. If you're coming from a laptop keyboard or a typical slim office membrane keyboard, the Pro Type mechanical keyboard might take some adjustment.
