Chemtronics VIS 300 Video Inspection Scope VIS 300B Kit - Manual (Page 8)

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Total charge time is approximately three hours and indicates a fully charged battery by
displaying a green LED on the charger. While charging this LED remains red.
10. Power On – The VIS display will indicate power available to the LCD and Probe by indication of
the green LED. During low battery conditions the LED will blink and continue to provide 1 hour
of operation.
11. Power – Power to the VIS display is enabled by pressing the Power control button. Pressing this
button while the unit is ON will power the unit OFF.