NovaStar LED Display Accessories MFN300-B Multi Function BoxNovastar MFN300 B is a multi function box with a variety of auxiliary functions. It has the following characteristics: 1) RS232 serial or Gigabit Ethernet port communication; 2) Support Ethernet port connection between two receiving cards or at the end; 3) Has timer function, can replace timer and delayer; 4) Support temperature detection of power distribution box; 5) Support humidity detection of power distribution box; 6) Support audio output; 7)