InfoComm 2018: Arthur Holm Demos Its Retractable Hideaway Device for Boundary MicrophoneJune 13, 2018 | Home / June 13, 2018 rave-video / InfoComm 2018: Arthur Holm Demos Its Retractable Hideaway Device for Boundary Microphone InfoComm 2018: Arthur Holm Demos Its Retractable Hideaway Device for Boundary Microphone