Feautures:

• [0.7PSI Startup] Starts up with only 0.7 PSI of water pressure, no need pressurizer pump anymore. Outfitted with 2 magnetic water flow sensors, which allows the unit to work at super low water pressure. Suit for rural areas, RV's and Boats.
• [Energy Saving] Rated at 4.23 GPM, provide endless hot water on demand and only as needed, no need to preheat making it more efficient and energy saving.
• [More Safety] Flame-out protection, anti-freezing protection, over heating protection to ensure the family safety. Automatically decrease water pressure between 0.7-138PSI. The anti-freezing drain plug can discharge the residual water to avoid freezing in cold areas or in case of long time no use. High water temperature protection over 185 °F. Shut off gas supply automatically under unexpectable flame out.
• [Stylish Design] Features of compact and space-saving design with minimal noise output which is portable for outdoors. It can bring an amazing hot shower for you when you are camping, to the beach, etc. Besides, you can also wash your pets with this tankless water heater.
• [Easy to Install] Equipped with 1/2" BSP water fittings and manual water temperature controls make it easy to install and use. Please verify it's the right size you need: net weight 23.4lb; size 25.6(L)x7.5(H)x15.7(W); maximum power output 109,000btu/hour (32kW).