Printers are nothing new, but the Selpic P1 is unofficially the world’s smallest handheld printer. It basically uses inkjet technology and works just like a pen, thus enabling you to print photos, barcodes, QR codes, or plain text on just about any flat surface. Despite its size, the printer can work at any angle, including horizontal / vertical orientations, and can quickly switch printing direction from left to right or vice versa.