ViewSonic VPAD10 User Manual page 19

 Wireless LAN indicator
When WLAN is turned on, it lights up in blue.
When WLAN is turned off, the light goes off.
 Battery status indicator
When the battery is charging, it lights up in red.
When the battery is low, it flashes in red.
When the battery is fully charged, it lights up in blue.
 Power indicator
When the system is on, it lights up in blue.
When the system is in Sleep mode, it flashes in blue.
When the system is o or in Hibernation mode, the light goes off.
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ViewSonic VPAD10