... seconds; 2.CCC Approval; 3.Dry Heating Prevention; 4.Enegry saving,Environment Friendl Instant Water Heater,Electric Water Heater,Water Heater ... constant temperature setting function. 7)No water tank ,Water saving ,Electricity or gas saving;8)Instant hot water, No need to install hot ... ;9)No risk of explosion; No need of electric or gas leakage;10)Complex design,Simple installation, Single phase power . ...