Long battery life of up to 25 hours. Splashproof and sweatproof with an IPX4 rating3 Easier, clearer handsfree calling Finetune your sound using the Sony | Headphones Connect app Easy to operation with buttons to play and pause, skip tracks and adjust the volume. A wellbalanced shape around the neck ensures a stable fit. The WIC100 headphones have a flexible neckband that fits to you. Sync your headphones easily with Fast Pair.4 Experience 360 Reality Audio for a truly immersive experience5