Although they probably could have come up with a slightly snappier name for it, the ‘Wireless Bluetooth Tablet’ from Trust does pretty much exactly what you’d think it would, adding drawing pad capabilities to any Bluetooth-equipped PC. While the wireless feature might not be that useful right next to your machine, in board room and other presentation settings, it could come in pretty handy. The Tablet has 512 levels of pressure sensitivity and a three button pen, is powered by AAA or AA batteries, and can be hooked up to a PC by USB in situations where no Bluetooth is available. Recommended price is around £85 (~$150).
Read [BIOS]
Related
Wacom PenPartner Miniature Drawing Pad [Gizmodo]
https://gizmodo.com/wacom-penparter-miniature-drawing-pad-9298