A device made up of two separate components. For example, most cellular network extenders require an antenna (box 1), which is cabled to the electronics (box 2) in order to work.
"two-box solution." YourDictionary, n.d. Web. 18 August 2018. <http://www.yourdictionary.com/two-box-solution>.
two-box solution. (n.d.). Retrieved August 18th, 2018, from http://www.yourdictionary.com/two-box-solution