[Legacy System Compatibility] VIQUA UVMAX 650716-006 OEM controller replaces discontinued Trojan UVMAX B and C models from 1994–2000, restoring proper operation without system modification or full unit replacement. [Audible & Visual Alerts] Built-in audio and visual lamp replacement indicators notify you when service is required, with a reset button to restart the timer after lamp changes for accurate maintenance tracking. [Lamp & Ballast Monitoring] Functions as both power supply and monitoring controller, converting 120V input while providing digital confirmation of lamp operation and ballast performance for reliable UV output. [Lightweight Easy Installation] Compact 2 lb design installs quickly by connecting the included lamp harness, fitting easily in tight spaces; compatible power cord sold separately or reuse existing cord. [Genuine OEM Replacement] Authentic VIQUA controller ensures full compatibility with legacy Trojan UVMAX systems, avoiding wiring issues and maintaining dependable performance with manufacturer-approved quality.