Echo lets users have access to Amazon Music, Prime Music, iHeartRadio and TuneIn, and with built-in Bluetooth, Echo is also able to play music from a phone or tablet. As it's connected to the cloud and Amazon Web Services, Echo is designed to learn and gain functionality over time, and an accompanying Amazon Echo app (Android/Fire OS only) or web interface is what lets Echo create alarms, music playlists, shopping lists, and more. Echo is priced at $99 for Amazon Prime members and $199 for non-Prime members, but currently users must request an invitation from Amazon to be allowed to purchase the device.