这种热水器应该配置控制逻辑电路，当出现无水或水位太低状况时，能够自动关闭加热元件的电源。
The unit shall be equipped with control logic that shuts down all electricity to the heating elements in the event of no water or low water levels in the tank.
除自动侦测外，使用者亦可手动控制开关，当一段时间侦测无人员活动时，雷达灯控即会自动关闭电源，节费电费并延长产品使用寿命。
Unless auto-detect, user also can control ON/OFF by hand. No one activities for a while, Radar Detector will automatic turn off power to reduce power bill amount and extended product life.
转动旋扭（如图）开机，可以根据需要调节旋扭可以控制摄像头灯的亮度，朝反方向朝反方向旋转可关闭电源；
Turn the knob to turn on the unit as the above diagram. You can adjust the brightness of the Camera lights by turn this knob too. Turn the knob at the opposite direction; you can turn off the unit.
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