Waterflow indicator used to sound alarm, light signal, actuate relays or starter switches for motors, pumps, etc., when low occurs.
流量指示器用于声音报警，灯光报警，当流量发生时启动电机、泵等继电器或起动器开关。
Be sure that you have a low battery indicator light.
肯定的是，您有一个低电池电量指示灯。
When this happens, the Low-Battery Indicator Light begins to flash, signaling that it's time to change the AAA battery.
当这种情况发生时，低电池指示灯开始闪烁，这表明它的时候改变的AAA电池。
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