Check the listing for details. Sony WI-C100 Wireless in-Ear Bluetooth Headphones with Built-in Microphone,Black. Color: Black, Condition: New. Listed at 33.00 USD. About this item Long battery life of up to 25 hours DSEE restores high frequency sounds lost in compression Splash-proof and sweat-proof with an IPX4 rating Easier, clearer hands-free calling Fine-tune your sound using the Sony | Headphones Connect app Easy to operation with buttons to play and pause, skip tracks and adjust the volume A well-balanced shape around the neck ensures a stable fit The WI-C100 headphones have a flexible neckband that fits to you Sync your headphones easily with Fast Pair. Experience 360 Reality Audio for a truly immersive experience Splash-proof and sweat-proof with an IPX4 rating With an IPX4 water resistance rating, splashes and sweat won’t stop these headphones – so you can keep on moving to the music. DSEE – Give your favorite music a boost When an original musical file is compressed our Digital Sound Enhancement Engine faithfully restores music to high-quality sound that’s closer to the original recording. Flexible neckband Lightweight and portable, the WI-C100 headphones have a flexible neckband that makes them even easier to slip into your bag when you’re on the move. Easy to use buttons The WI-C100 headphones are easy to operate, with buttons to play and pause, skip tracks, adjust the volume, and receive calls. For convenience, the buttons have been redesigned, with a more pronounced shape making them easier to press Clear hands-free calling Conversations flow freely with clear hands-free calls thanks to our high-quality built-in microphone. Your sound, how you like it Fine-tune your sound using the Sony | Headphones Connect app. Fast Pair Quickly and effortlessly pair your headphones with your Android device with just a simple tap. Experience 360 Reality Audio Sound as real as if you are there at a live concert or with the artist in the recording studio.