Auto-pair, Auto-sound: Pair automatically when the AUSDOM M04S HiFi NFC Bluetooth 4.0 Over-ear Headphones close to your phone with NFC function on, time-saving to enjoy music. 

Deep Bass Stereo Sound: Dual 40mm drivers and advanced chip deliver high definition sound-optimized PowerBass.

Advanced BT 4.0 Tech: The Bluetooth chip supports A2DP, AVRCP, HFP and HSP , easy for smooth music, movies, TV shows or hands-free clear calls! 

20H Long Battery Life: Built-in 400mAh rechargeable battery provides up to 20H MUSIC PLAYTIME, ultra-low power consumption for your better listening experience.

Cloud Soft for Your Ears: CloudSoft ear-pads with ergonomic adjustable headband allow you a custom fit.