Active GPS Antenna for use with the mn100 Micronet system. , Easily adds Position, Course and Speed Over the Ground to your mn100 Micronet system., Wires directly to the T122 Wirless NMEA Interface, Can be mounted inside or outside the boat, 16 parallel channels, Weighs only 108 grams without cable, Accurate to 3.3m RMS*(DOP<3), Mounting: 22mm(D)x 15mm(H)Bolt, Comes with standard (1″x14) pole mount adapter suitable for use with deck, mast and stantions, Small form factor, Simple installation.