The Panasonic RBM300B Deep Bass Wireless headphones capitalize on heavy bass sound so you can enjoy your music to the fullest. The XBS DEEP (Extra Bass System Deep) delivers well-defined deep bass so you'll feel the impact of dynamic sound with your entire body as if you are in a live house or concert hall. The 40mm Free Edge Driver System delivers dynamic bass sound with significantly less distortion while realizing transparent mid-to-high frequency sound. Acoustic Bass Control reproduces bass sound with precision, while the Harmonic Tuning EQ meticulously adjusts around the 3.5 kHz range to deliver crisp and clear mid-to-high range while enhancing bass sound in the lower frequencies. Apply an equalizer for stronger bass with the touch of a button: the Bass Enhancer clarifies the bass for even more sound, expanding the range of music you can play. Side Pressure Dispersion Technology evenly spreads out lateral pressure around your ears for a more comfortable fit, allowing you to enjoy music for a long time. Launch your smartphone voice assistant through the built-in mic to select music, adjust the volume, and make phone calls with your voice. Bluetooth compatibility allows you to enjoy up to 50 hours of wireless playback when fully charged; if you’re in a rush, use a 15 minute quick charge for 90 minutes of playback.