InfoComm 2018: Longjoy Technology Demos the 5501 55″ Interactive Touchscreen Display June 13, 2018 | Home / June 13, 2018 rave-video / InfoComm 2018: Longjoy Technology Demos the 5501 55″ Interactive Touchscreen Display InfoComm 2018: Longjoy Technology Demos the 5501 55″ Interactive Touchscreen Display