Amazon Echo Dot is a hands-free, voice-controlled device with a small built-in speaker so it can also connect to your speakers or headphones over Bluetooth or through a 3.5 mm audio cable to deliver stereo sound to the speakers you choose. Echo Dot connects to the Alexa Voice Service to play music, provide information, news, sports scores, weather and more. Prime members can also ask Alexa to order eligible products they've ordered before and many Prime products. All you have to do is ask.