The Cyclone over-the-ear Bluetooth padded and adjustable headphones are compatible with most Bluetooth-enabled smartphones, tablets, laptops and desktop computers, and connect wirelessly up to 30 feet away. The integrated microphone allows you to make hands-free calls. The rechargeable, lithium-ion battery will fully charge in about 2 1/2 hours and delivers over six hours of wireless play. Other features include volume control / navigation buttons, on/off switch and Bluetooth version 2.1. The headphones are also foldable for easy transport and include a USB charging cable and drawstring pouch. FCC VOC, FCC ID, MSDS, UN38.3, Prop 65, 7P, BQB-EPL certified.