Positive Vibration Frequency features big drivers and precision sound. Superior sound with 40mm dynamic drivers for high-performance audio. Ultra-comfortable plush ear cushions and headband padding for hours of listening. Powerful rechargeable battery provides 34 hours of playtime. Onboard controls for play/pause skip tracks and volume control. Built-in microphone supports hands-free calls. Made with FSC certified wood and recyclable aluminum. 15 Minute quick charge for 4 hours of listening. Comes in sustainable packaging. Includes charging cable.