Marey ECO110 is a tankless electric water heater that offers instant heating without standby heat loss, saving energy. It features micro-computer control and multi-layer insulation for safety, with an intelligent self-diagnostic system that displays error codes for easy troubleshooting. The digital panel allows for precise temperature setting, and the unit can handle flow rates up to 3 GPM, providing a comfortable showering experience. Installation requires a dedicated circuit breaker, 8 AWG wiring, and proper grounding.