Wireless Bluetooth Freedom – Stable Bluetooth connection with up to 10 m range for music, podcasts and calls without cables Powerful 40 mm Stereo Sound – Large drivers deliver clear audio with deep, punchy bass and balanced mids Up to 18 Hours Battery Life – Enjoy long listening sessions on a single charge; fully recharges in approx. 2.5 hours Built-In Microphone for Calls – Take hands-free phone calls directly through the headphones with clear voice quality SD Card & Wired Playback – Play music directly from SD card or use the included AUX cable for wired listening