Enjoy crisp, powerful sound while listening to your favorite tunes with these Nuraloop earbuds. The rechargeable LiIon battery provides over 16 hours of use on a single charge, and four pairs of multisize silicone ear tips offer a comfortable, secure fit. These Nuraloop earbuds have integrated microphones, which capture sound clearly while answering calls, and active noise-cancellation technology blocks background noise for an immersive listening experience.