Panasonic RB-HF420B are wireless, overhead headphones with a high-capacity battery that can play music for up to 50 hours. They also have a quick charge feature that provides about three hours of playback from a 15-minute charge. The headphones have a slim design, stylish colors, and enhanced bass with a 30 mm driver unit and neodymium magnet. The ear pads can swivel to make them flat and portable.