On demand hot water-no delay , 99% Efficient, Integral 1/2"" compression fittings on bottom, High temperature limit switch protects against element burn out, 478239 has microprocessor temperature control for accurate temperature; 100-140 range, 0, 7 GPM minimum flow rate for operation, Supports multiple lavatories, 9, 5KW, Volt: 240/208, SKU: HMREX388