Laser Engraver for those small tasks you can do on the move.  Internal battery so is very portable. You can bluetooth the image from your phone straight onto the item you want to engrave, see pics.  I also have a few videos of this working too if you are interested, just message me and I will send over.

NEJE seem to be a company that manufacture or at least put their name to a lot of Laser Engravers/Cutters.  Please research before purchasing.  Their is a site for downloading the SW App for Android & IOS, again pls research before buying as I'm not an expert on your device 😉.  It will come with a PC lead too.  I didn't go this route as it was simple enough to use on my phone tbh. 

It will be considered that you know what you are buying and how to use this device.  For safety you must wear eye protection (cheap on Amazon & not included).  I cannot and will not take any responsibility for misuse.  This has a 3.5W Laser output I belive and hence will 🔥 if not respected.