The HF420B headphones combine a clear, dynamic sound, with 50 hours non-stop playback, so you can immerse into your personal soundtrack. HF420B sleek design and stylish colour will fit your style. The HF420B's high-capacity battery allows up to 50 hours of continuous playback. With over two full days of playback from a single charge, you can wave goodbye to the hassle of having to charge mid-travel. The Quick Charge feature provides around three hours of playback from a 15-minute charge. Get ready for powerful sound from around-ear housings with 30 mm driver unit and neodymium magnet. Extra Bass System (XBS) combines Acoustic Bass Control that optimizes air flow via a filter and an acoustic tuning circuit to enhance low range reproduction. Enjoy robust bass without distortion with your HF420B. With a slim design and stylish range of colours, there’s an HF420B to suit your individual style. The swivel design of HF420B ear pads will realize easy transport. Just flip the ear pads to make ear pads flat and portable, so you can carry it anywhere with you.