DYNAMIC AUDIO AND ACTIVE NOISE CANCELLATION (ANC) - Premium speakers deliver crisp, balanced sound. Sealed in-ear design and ANC limit background noise. | CUSTOMIZE YOUR AUDIO - Audio Personalization helps tune audio for your unique hearing preferences to enhance your enjoyment of music and more. | COMPACT AND COMFORTABLE - Echo Buds with Active Noise Cancellation are small, light, and IPX4 sweat-resistant, with a secure, customizable fit that's made to move with you. | HANDS-FREE ENTERTAINMENT - Works with the Alexa app to stream music, play podcasts, and read Audible audiobooks-just ask. Use your voice to make calls, set reminders, add items to your shopping list, and more. | SEAMLESS SWITCHING - Connect to two devices at the same time and automatically move between devices with multipoint pairing. Move from a video call on your laptop to music on your phone without skipping a beat. | LONG-LASTING BATTERY - Get up to 5 hrs music playback per charge and up to 15 hrs with the charging case. A 15-min quick charge provides up to 2 hrs of music | WORKS WITH OTHER ASSISTANTS - Compatible with iOS and Android, and supports access to Siri and Google Assistant | DESIGNED TO PROTECT YOUR PRIVACY - Amazon is not in the business of selling your personal information to others. Built with multiple layers of privacy controls including the ability to mute the mics with the Alexa app.