LATEST BLUETOOTH TECHNOLOGY - Using Bluetooth version 4.1 with aptX A2DP profile this is the most advanced Bluetooth headset to date 20 HOURS OF PLAYBACK - Listen to your favourite songs, podcasts, or audiobooks all day long with up to 20 hours of playback and 400 hours standby CLAMSHELL CARRYING CASE - Protect your headphones wherever you go. Keep them bundled safely with the all-included clamshell case. CONTROL YOUR MUSIC AND PHONE - Switch tracks, adjust volume, and answer calls with use of the function keys ONE YEAR WARRANTY - 12-month warranty in USA