Hour Playtime: A single charge delivers days of listening. And when you’re in a rush, recharge Life U2i neckband Bluetooth headphones via USB-C for 5 minutes and enjoy 2 hours of playtime. High-Quality Sound: 10 mm drivers (20% larger than ordinary earphones) have a bio-cellulose diaphragm to produce high-detail treble with superior clarity. Switch on BassUp mode for up to 70% more bass. Your voice is picked up and enhanced while background noise is effectively suppressed to ensure you’re heard in exceptional clarity even if you’re in a noisy environment. Ergonomic 3D Comfort: Life U2i neckband Bluetooth headphones have a lightweight silicone neckband with a titanium alloy steel core to ensure a snug fit on your shoulders and superior shape retention. IPX5 Waterproof: A waterproof casing protects Life U2i neckband Bluetooth headphones against rain, water, and more