Long battery life of up to 25 hours. _x000D_ Splash-proof and sweat-proof with an IPX4 rating3_x000D_ Easier, clearer hands-free calling_x000D_ Fine-tune your sound using the Sony | Headphones Connect app_x000D_ Easy to operation with buttons to play and pause, skip tracks and adjust the volume._x000D_ A well-balanced shape around the neck ensures a stable fit._x000D_ The WI-C100 headphones have a flexible neckband that fits to you._x000D_ Sync your headphones easily with Fast Pair.4_x000D_ Experience 360 Reality Audio for a truly immersive experience5_x000D_