3 Heat Settings ZAFRO Oil Filled Radiator Heater has 3 heat settings, press the power switch button to either I (Low heating/600W) or II (Medium heating/900W) or both I+II (High heating/1500W), when you plug in and press the switch button to either I or II or I+II , the indicator of the oil heater will turn on immediately. Tip-over & Overheat Protection :The Radiator Heater has a built-in TIP Protector and a Over-heating Protector. You don't need to worry about safety issues when using the Electric Oil Heater and the space heater is ETL certified to be safe for using. The power indicate light can let you know at a glance that it s plugged in. Quiet Operation & Energy-Saving :ZAFRO Oil Radiator Heater offers you a warm and cozy atmosphere without any heater sounds that disturbs you and you could adjust the temperature to meet your needs. Especially, our room heater can heat a 120 sq.t room quickly , which means it can reduce your energy bills effectively.