• Product Overview: The Sony WI-XB400 is a lightweight, flexible wireless neckband headphone engineered with Sony's EXTRA BASS technology. Designed to deliver deep, punchy low-end response while maintaining vocal clarity, it features custom-tuned 12mm dynamic driver units. Built with a soft, flexible neckband that coils compactly for easy storage, the WI-XB400 offers all-day wearing comfort at just 21 grams. Offering up to 15 hours of continuous wireless playback on a full charge, a 10-minute Type-C quick charge provides up to 60 minutes of music playback. Outfitted with magnetic earbuds for tangle-free carrying around the neck, inline playback buttons, and hands-free voice assistant support, the Sony WI-XB400 is an ideal everyday audio companion. • Key Highlight 1: Signature EXTRA BASS Sound - Enhanced low-end frequencies deliver powerful, punchy bass performance with clear vocals. • Key Highlight 2: 15-Hour Battery Life & Quick Charge - Up to 15 hours of continuous playback with a 10-minute USB-C quick charge providing 60 minutes of battery life. • Key Highlight 3: Magnetic Earbuds & Flexible Neckband - Soft, lightweight neckband with magnetic housings that clip together to prevent tangles when not in use. • Key Highlight 4: Hands-Free Voice Assistant & Inline Controls - Easy button controls for music playback, volume adjustment, taking phone calls, and triggering Siri or Google Assistant.