Choose tablet with a touch screen that can respond quickly. For a 7-inch tablet should select screen which has a resolution of 1,024 x 768. The camera has a resolution above 3 Mp Search for a tablet that has RAM Min 512, Min 1 Ghz processor.
Make sure the tablet to be purchased has the availability of updates in the future. Adjust connectivity with the network to which the tablet will be used, the best option is the WiFi plus 3G tablet. Provide a minimum of 1 year warranty.