With the Panasonic RB-M500B Deep Bass Wireless Bluetooth Immersive Headphones you'll revel in powerful bass playback with their exceptional deep bass response through Panasonic's XBS DEEP (Extra Bass System Deep) developed for total bass immersion with optimal tuning of the housing structure a driver equalizing function and an equalizing function Plus with a built-in Bass Reactor to amplify low frequencies present in each track’s low frequencies you'll experience the deep booming bass vibe you'd enjoy at a concert or nightclub The Panasonic RB-M500B headphones also include Harmonic Tuning EQ to clearly play back heavy bass sound by adjusting harmonic overtones to magnify bass sounds below 100Hz and conversely suppressing bass above 100Hz that can create muffled noisy sound The A Free-Edge Driver System enables more air to move in the powerful 40 mm Neodymium driver units to pump out satisfying bass level more evenly through distortion-resistant diaphragms while a Bass-Blow Port provides optimal positioning of the air outflow port in the cabinet the diaphragm’s precise piston movement crisply reproduces low-end frequency outlines With a full charge the Panasonic RB-M500B high-capacity battery provides up to 24 hours of playback A handy Quick Charge feature helps keep the bass flowing for up to 5 hours Soft cushioned headband and earpads fit gently over the ears and for hours and hours of anytime anywhere bass-loving comfort Adjusters apply even pressure on the head and around the ears for a firm personalized fit To help save power when power is low or when fully depleted an included detachable 6 6 ft cable lets you connect your headphones to devices and home audio systems A 1 6 ft microUSB charging cord is also included Available in Black and Sand Beige