On / off switch
①
USB port
②
Time
③
Battery indicator
④
Adjustable Intensity (A Channel）
⑤
Adjustable Intensity (B Channel)
⑥
Intensity Decrease
⑦
Channel A
⑧
Lock
⑨
Mode Selection
⑩
Intensity Increase
⑪
Channel B
⑫
Time Selection
⑬
Two output connector
⑭
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