Major IV delivers 80+ solid hours of wireless playtime. Major IV’s new, improved ergonomic design means that when you’re deep diving into your music, the tenth hour is as comfortable as the first. Re-Engineered - New ear cushions + 3D hinges + straight fit headband + loop wire with reinforced rubber dampers. Major IV can be charged wirelessly, so it’s now easier than ever to charge and go. The multi-directional control knob lets you control your music and phone functionality with ease.