Meet the Nurugo Micro: a compact, smart digital microscope that mounts on the back of your smartphone and offers up to 400x magnification. There are not cords or additional batteries to deal with. It lets you take enlarged photos and videos at a high resolution. The device is small enough to fit in your pocket.
This compact microscope weighs only 3.89g. It is compatible with iOS and Android devices. You can find out more about it on Kickstarter.