Polish startup has created a mouse that’s also a PC. Mouse-Box is a wireless gadget that packs a 1.4 GHz quad-core ARM processor, a micro-HDMI port, WiFi up to 802.11n, accelerometer, gyroscope, two USB 3.0 ports and 128 GB storage space into a mouse. The only extra hardware needed is a monitor. Device charges wirelessly using an inductive charging mat that doubles up as a mouse pad. Device could theoretically be loaded up with any operating system of your choice.
Source: https://thehackernews.com/2015/01/mouse-box-computer.html