It looks like they have combined several bits of technology:
hand-waving robot from Lost In Space. Via The Guardian and Posthip Scott. For comparison, here is one of the first inertial navigation systems:
Litton Industries LN-3 Inertial Navigation System. Used in the F-104 Starfighter in the 1960's. It is roughly a thousand times bigger and a thousand times less accurate than a modern cell phone.