We should put switch to bottom position to see the red lightindicator.
应将开关拨至下方位置，看到充电器红色指示灯方可。
2
This article discusses the research and special usage of a sound and lightindicator of a kind of logic pulse probe.
本文介绍了一种声和光指示的瞬间电脉冲检测器的研制及其特殊用途。
3
A . Charge for at least 20 minutes before first use. Complete charging in 2 hours. Headset will not function when charging. Headset is charged when LightIndicator is blue.