Keychron K12-E4 Wireless Mechanical Keyboard 61 Key RGB Backlight Banana Switch Optical Hot Swappable both of these close-up distances

both of these close-up distances are only possible with manual focus

Long Distance and Extreme Weather

HD up to 59

The rear lens focuses and magnifies the beam onto the larger 6" front Fresnel lens

Keychron K12-E4 Wireless Mechanical Keyboard 61 Key RGB Backlight Banana Switch Optical Hot Swappable both of these close-up distancesKeychron K12 E4 Wireless Mechanical Keyboard RGB Backlight Optical Hot swappable Banana Overview A 60% COMPACT WIRELESS MECHANICAL KEYBOARD Engineered to maximize your productivity with most popular 60% layout. The K12 hot swappable option on Optical and Mechanical switches offers the freedom to easily personalize your typing experience without soldering. WIRELESS AND WIRED MODES Connects with up to 3 devices via Bluetooth and switch among them