Wireless bluetooth - Built-in CVC8.0 compatible microphone reduces wind and environmental noise for clearer calls. - Speaker uses a high-quality driver unit that utilizes Sony's acoustic technology to deliver a high level of acoustic performance. - Can be used for 6 hours on a single full charge and the battery storage case holds up to 12 hours of recharge power. Charges inside the case. - Weighing merely 0.16oz (4.6g), these lightweight earbuds are so comfortable that you'll forget you're wearing them. - IPX5 waterproof - Product dimension: 0.7"x1"x0.5" / 20mm×27.9mm×14.1mm