Triplett CamView W35v – PN: 8055 - Manual (Page 15)

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8: General Instructions
Turning the Product On:
After charging the batteries (see Section 7), slide switch (8) to its upper
position to turn the product on. When operating from batteries, the
LED should light up green.
The CamView W35v continually tests for the presence and type of video
signals applied to its input. It will automatically detect NTSC or PAL
video signals, select the appropriate format, and display the video
image.
If no video signal is present, the product will enter a power saving
Standby mode. The screen will go black. The green LED will remain lit.
If video is present, it will be displayed on the LCD screen.