Details: 

Camplux complete line of reliable RV tankless water heaters for all recreational vehicle applications. Camplux RV water heaters RS264/RS264B Pro upgraded series, built-in corrugated water tank, long term thermostat, also heats up your water while driving. Compact size, energy efficiency, and on-demand hot water supply. Come with a door and indoor mounted switch controls. 

Features:

• 【Universal Tank Heaters Substitutes】Min cut-out size, 13x13 in, Max cut-out size, 13.3 x13.3 in, and the door is 15 x 15 inches, can replace Suburban and Atwood 6 gallons tank water heaters, as well as Girard and Furrion's tankless water heaters.
• 【6,5000 BTU Powerful Energy Efficiency】provide instant hot water on demand, adjust temperature ranges from 95°F-125°F, allowing travelers to enjoy hot showers and clean dishes, while on the road or at campsites.
• 【Max up to 3.9 GPM】Built-in water flow switch, adjust the hot water flow according to the amount of water stored in your RV, 2.64 GPM.
• 【Convenient】Intelligent LED touch control screen, 12V dc control switch mounted inside for convenient control of water heater gas ignition, adjust temperature, and powers the electric element circuit.
• 【Temperature Stable】Camplux RV water heaters RS264/RS264B Pro, built-in corrugated water tank, effectively keeps the temperature stable even when the car is in motion.
• 【Rapid Heating】It is designed to heat water quickly, is essential for convenience and comfort,especially when traveling in colder climates.
• 【Energy Saving】Camplux RV water heaters consumes half the LP gas that 6 gallons tank water heater would consume for the same amount of hot water, hot water supply lasts over 20 mins.
• 【Intelligent Control】LED touch control screen, 12V dc control switch mounted inside for convenient control of water heater gas ignition, adjust temperature, and powers the electric element circuit.
• 【Smart Alerts】For easy troubleshooting, the control panel also displays error codes if issues arise.
• 【Safety】CSA certified, built-in forced exhaust fan on top, stable combustion, automatic gas shut-off for accidental flame failure.
• 【Built for the Road】Designed for durability and performance on the road to withstand the strong vibrations of uneven terrain during travel.
• 【Warm Tips】Electric Supply, more than 5 Amp, 12V, DC, Gas Supply, propane.

Warm Tips-Power Supply

Need to choose an adapter with current: 4A or more, voltage: 12V DC.