The Balboa ML400 Control Panel (Part 53291) is a 4‑button electronic topside keypad designed for Balboa EL and GL series spa control systems. This model is supplied without the overlay, making it ideal as a direct replacement keypad when the existing overlay is still in usable condition. It features a compact oval design (7.5″ × 2.3″), an LCD display, and four functional buttons supporting systems with 1 pump plus auxiliary functions. It connects using an 8‑pin Molex plug with a 7‑foot cord, and is fully compatible with GL2000, GL2001, and GL8000 control boxes.