Amazon discounts several preorders for second-generation Amazon Echo Dot home automation bundles, as listed below. All items qualify for free shipping. The Echo Dot is a voice-controlled device that uses Alexa to play music (via Prime Music, Spotify, Pandora), control smart home devices (via Samsung SmartThings, Wemo, Nest), and do lots of other cool stuff (order a pizza via Domino's, order car service via Uber, play Jeopardy). It features 802.11n dual-band wireless, Bluetooth, and a 3.5mm audio output. The bundles, all scheduled for release on October 20: