The Panasonic RB-M300B Deep Bass Wireless Headphones capitalise on heavy bass sound for you to enjoy music to the fullest. RB-M300B features XBS DEEP that delivers well-defined deep bass and also has Bass Enhancer to further emphasize bass when you want. ULTRA-LOW BASS RESPONSE Enjoy powerful deep bass, without compromising the depth and balance of the track. WIRELESS PERFORMANCE Reliable Bluetooth® connectivity with built-in microphone. 50 HOURS PLAYBACK On a full four-hour charge, plus quick 15min charge for 3 hours playback. DUO POWER DRIVERS Two 40 mm Neodymium driver units provide deep, yet delicate bass sound. HIGH-COMFORT FIT Soft cushioned headband and earpads fit gently over the ears for hours of anytime anywhere comfort.