ViewSonic VPAD10 Bedienungsanleitung Seite 17

 Vents
Dissipate heat and keep your VPAD10 at an optimal temperature.
 3G SIM card slot
Insert a 3G SIM card (can not support PnP), then you can connect to 3G network.
(For more information, please contact local Telecom Operators.)
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ViewSonic VPAD10