I have a character (Ysoki Envoy 5) that purchased a SpyDrone (SCR page 221). I added the SpyDrone as a companion but it is lacking the hover drone chassis (SCR page 75), cannot select a language and is missing the bonus skill unit for stealth.
As stated on page 221 of the Starfinder Core Rulebook: "A spy drone is a Tiny remote drone designed specifically to make observations at a distance. This acts as the flight hover [sic] drone of a 1st-level mechanic, except it cannot make any attacks and it has no weapon mounts, no feats, and no ability to add drone mods. Its skill unit is always Stealth. It cannot speak, but it does understand one language (chosen by you at the time of purchase) and allows you to attempt Perception checks using your own bonus when you directly control it (as the master control ability of a mechanic drone). A drone can be upgraded with any one of the following technological items by paying 125% of the item's price: flashlight, grappler, lantern, laser microphone, motion detector, scanner, or X-ray visor. The price of buying and installing one upgrade includes the price of replacing an old upgrade on a drone, if applicable. "
Windows 10 Pro x64 build 1709
Got the first part. Purchasing upgrades and such will have to be another request.