DataWind's 7+ has a 7-inch, 800 x 480 pixel resistive touchcscreen display with 2GB of internal storage, while the 7c has a capacitive touchscreen display and 4GB of internal storage.
Each tablet is run by a 800MHz single-core processor and 256MB of RAM. There are no cameras or mics, but there are USB and microUSB ports.
Both tablets run on Android 2.2 Froyo, have 2.5G cell modems and have small 3200mAh batteries. The tablets will cost less than $75 and 2GB of data bandwidth costs just $2 per month.