Micro Control Systems Expansion Boards MicroSI8-AO4. Expansion board for a MicroMag with eight 0-5vdc sensor inputs, four 0-10vdc analog outputs, MCS-I/O communication port, no keypad or display, and 24vac operation. Best LTE antenna and booster for the boat - SailBits For almost two years I have been testing, re-testing, and re-wiring my setup on Grace in an effort to find the best LTE antenna configuration. I don’t remember another project I worked on that took so much time and effort to gather data. The search for a good antenna system led to some surprising choices. Ubiquiti Bullet2HP Installation and Onboard Wifi POE Injector (Power Over Ethernet) The POE Injector is the power source for the Bullet. The injector receives 12 volt DC from my boat and injects that into the Cat 5 cable where the Bullet picks it up as its power supply.