Automatic Leveling Control - Single Actuator As wind shifts, water conditions change or passengers move about, the Automatic Leveling Control (ALC) will automatically adjust your trim tabs to maintain a level boat for a more comfortable and enjoyable ride.The ALC automatically corrects the roll from side to side and pitch from fore to aft to enhance your boating experience and improve your fuel economy.Features:Microprocessor based automatic leveling trim tab control with LED tab position indicators Controls roll and pitch automaticallyInternal GPS - no GPS antenna or network requiredAutomatically adapts to varying sea conditionsCompletely sealed and waterproof (IP68)UV protected - will not deteriorate in sunlightPrevents automatic corrections while turningDesigned for planing and semi displacement hulls larger than 20ftActuators connect directly to ALC-1 display panel (no external power module box required)Automatically dims LED tab position indicators in darkness and brightens in sunlightAutomatically retracts trim tabs when boat is off plane or using optional key switch connectionTechnical Specifications:Display Color - BlackActuators per Tab Plate - One (1)Dimensions (W x H) - 3.15" x 3.07" (80 x 77 mm)Mounting Hole Cutout - 2" (50 mm)Operating Voltage - 12 or 24 V*Sold as an Individual