The Echo Buds True Wireless In-Ear Earphones from Amazon integrates hands-free access to the Alexa digital assistant via the Alexa app on your iOS or Android device. Alexa is your digital companion that can be voice controlled to manage your audio entertainment and much more. Ask Alexa to adjust the volume, play a track or audiobook, set a timer, provide navigation, call an Uber - all you have to do is ask. Alexa has tens of thousands of skills that let you use your phone and apps via voice commands. When it comes to enjoying audio, the Echo Buds utilizes dual Knowles balanced armature drivers to deliver clear and accurate sound from your mobile device. The built-in batteries provide you with up to 5 hours of playback, with an additional 15 hours available via the included charging case. That's up to 20 hours of audio before you need to plug anything in. To further enhance your enjoyment, the Echo Buds also feature Bose Active Noise Reduction technology, which is designed to actively reduce background noise.