JAM Transit City True Definition Wireless Headphones provides a wireless connection to your iPhone, iPad, Android, smart phone, tablet and other favorite Bluetooth-enabled electronic devices. Active Noise Canceling and a Comfort-Fit design will let you enjoy up to twelve hours of play time on a full charge. When you need to take a call, use the Hands-Free Calling feature to seamless switch from your music. Collapsible Design and a pre-charged battery let you be on the go as soon as you get your JAM Transit City True Definition Wireless Headphones. Aux-In cord included for any audio devices that have regular headphone outputs.