Beacon GPS Receiver B20 is beacon channel GPS receiver, automatically selecting the nearest beacon station signal. It can reali ... hours since last fix)Reacquisition: <1 sNEMA Information: GGA, GLL, GPS, GSA, GSV, MSS, RMC, VTG, XTE, ZDA and CHC special ... KgOperation Temperature: -30 - +65Humidity: 100% condensing, unit fully sealed. Beacon GPS Receiver B20