... Protection,big LED screen 3.Digital constant temperature gas water heater 1.low startup water pressure, meet the requirement of both the high ... -floor and low water pressure user. 2.Anti-electricity leak,Anti-no water buring,Anti-over temperature,Anti-flameout ... . 3.Auto-mechincally test the quota of oxygen and exhaust gas, when the oxygen of buring tank opproaches the criticalpoint, the ...