Garmin Shadow Drive f/GHP GHP 12 & GHP 20 [010-11054-00] Sporlan Valve This omni-directional 9dB gain cellular

This omni-directional 9dB gain cellular antenna improves signals on cellular (810-900 MHz) and PCS (1800-1990 MHz) bands

Float Voltage: 13

On-Board Battery Charger 10A / 12V - 1 Bank - 120V Input

or a combination of both

Garmin Shadow Drive f/GHP GHP 12 & GHP 20 [010-11054-00] Sporlan Valve This omni-directional 9dB gain cellularShadow Drive The GHP 10's patented Shadow Drive technology gives boaters the security of knowing they maintain control even when relying upon the autopilot. Use this Shadow Drive attachment to automatically disengage the autopilot if the helm is turned, allowing the helmsman to maneuver the boat. 1 4" Female NPT Fittings Compatible Devices: GHP 10 Marine Autopilot System GHP 12 Autopilot System GHP 20 for Hydraulic Steering Corepack GHP 20 Marine