Snap-on LCD brings mini displays to any 120mm PC fan — Thermalright's Fan Frame Vision-1 lets you display information and custom themes on your case fans

The Thermalright Fan Frame Vision-1 is a clip-on 3.69-inch screen that snaps directly in front of your PC case fans. These accessories let you display temperature, fan speed, and other information across your case, and even create a unified theme across all the screens in your PC.

Source: Tom's Hardware