Lectrotab SLC-11 One-Touch LED Leveling Control - Boat Auto Trim Tab SystemConvenience, ease of use, and reliability are the hallmarks of Lectrotab's SLC-11 One-Touch LED Leveling Control. With this control system, you have complete command over your boat's trim tabs at your fingertips, making boating more enjoyable than ever before.Features: Microprocessor-based trim tab control with LED tab position indicators Single-button press to move both tabs up or down simultaneously Automatic return to the last tab position if the ignition key is turned off and back on again Completely sealed, completely waterproof, and impervious to sunlight deterioration No external power module required for single or dual actuator per tab systems LED tab position indicators dim automatically in darkness and brighten in sunlight Adjustable programming features for personalized control Technical Specifications: Display Color: Black Actuators per Tab Plate: One (1) or Two (2) Dimensions (W x H): 3" x 3" (77 x 77 mm) Mounting Hole Cutout (H x W): 2.25" x 2.5" (57 to 64 mm) Operating Voltage: 12 or 24 V Sold as an IndividualLearn More: Trim Tab - Wikipedia Boating - Wikipedia