Garmin Accessory GMR Fantom 24 010-01707-00. 4" diameter 9.8" high (64.5 cm diameter 24.9 cm high) Weight:21 lb (9.5 kg) Water rating:IPX7 Power consumption:3 W standby; 18.1-24.4 W transmit Antenna length:23" (58.42 cm) Rotation speed (RPM):24/48 rpm...