ViewSonic VPAD10 Guia Del Usuario página 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.)
7
ViewSonic VPAD10