 The device has two versions, a Nook that includes Wi-Fi and AT&T 3G wireless connectivity, and one that only includes Wi-Fi.Announced on May 25, 2011, the Simple Touch Reader (also informally referred as Nook 2nd Edition) was released on June 10, 2011 at a retail price of US$139.The Simple Touch is a Wi-Fi only Nook, with an infrared touch-screen, E Ink technology, and battery life of up to two months (or 150 hours, offering approximately 25,000 continuous page turns with Wi-Fi turned off).