A handy writing gadget that slips into your handbag or your pocket the go3 led smart pen has three functions all wrapped up in one technical looking body a retractable ball pen you can illuminate your writing surface in the dark with the led writing light and should you need to use your smartphone or tablet this handy gadget also becomes a stylus using its soft end cap to guide you around your favourite appsr r go3 3in1 smart pen3 functions retractable ball pen led writing light and smar