【INSTANT HOT WATER FOR 2 SHOWER + 2 SINKS】 Power simultaneous use in 2 bathrooms and 2 sinks! The Apolo-18kW delivers 4.2 gallons per minute (GPM) of continuous hot water – ideal for showers, sinks, and appliances like dishwashers without temperature fluctuations or wait times. 【SMART WI-FI VOICE CONTROL】Remotely control water temperature and restart the unit via app or voice commands (Alexa/Google Home compatible). Adjust settings from 86°F to 140°F in 1° increments. The easy-access rotary knob and clear LED display offer convenient local control and real-time status monitoring. 【EFFICIENT 18kW PERFORMANCE】Engineered for homes with 75A electrical demand. Compatible with 2 × 40 AMP (DP) breakers + 2 × 8 AWG wiring. Features 3/4" NPT connections and low activation flow (0.66 GPM) for instant response. 【ETL SAFETY CERTIFIED & DURABLE IPX4】Operate with peace of mind. ETL certified with comprehensive 4-layer protection (leakage, overheat, dry-fire, high voltage). Features IPX4 waterproof rating and separated water-electricity pathways to combat corrosion and scaling, ensuring long-lasting reliability and minimal maintenance. 【SPACE-SAVING WHOLE-HOUSE SOLUTION】 Free up valuable floor space! Unlike bulky tank heaters, this compact tankless unit (17"H × 13"W × 4.3"D) mounts flush to your wall. Its streamlined design is the perfect, space-efficient solution for bringing continuous hot water to every faucet in your home or large apartment.