Immersive sound: premium speaker drivers deliver crisp, dynamic audio. Bose Active Noise Reduction Technology and sealed in-ear design limits background noise. Hands free with Alexa: Echo Buds work with the Alexa app to stream music, play Audible audiobooks, make calls or check your calendar - just ask. Access other assistants: provides access to Siri or Google Assistant from a supported device - just press and hold your earbud. Long-lasting battery: get up to 5 hrs' music playback per charge, up to 2 hrs with a quick 15-minute charge and up to 20 hrs with the charging case. Customisable fit for better sound: Multiple sizes of ear tips help form a comfortable in-ear seal for immersive listening. The Ear Tip Sizing Test in the Alexa app can help ensure the right fit for the best sound. Exercise ready: sweat resistant with a secure fit that’s made to move with you. Alexa is always getting smarter and adding new skills: get a guided workout, order a taxi or even takeaway, all hands free. Designed to protect your privacy: Built with multiple layers of privacy protections and controls, including the ability to mute the microphones with the Alexa app.