The AC701 Digital Touch Screen Movement and Sound Baby Monitor helps you to watch over your baby as the sleep, combining all the features of the bestselling AC401 plus many more. Why Buy Me? - Under-the-mattress sensor pad - Detects even the most subtle of movements and alerts when there is no movement for 20 seconds. - LCD Touchscreen parent unit allos you to make simple changes to settings. - 2-way talk-back feature, comforting your baby from another room. - Temperature display and control, keeps your baby comfortable and alerts you when it's too hot or cold.