mobile unit

noun
  1. a vehicle supplied with the basic equipment or materials necessary for a particular purpose, as for televising on location or being used as an x-ray or inoculation clinic.
  2. a transceiver in a vehicle or carried by a person.

Origin of mobile unit

First recorded in 1930–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018