The DJ Slims are rugged, wireless headphones with a built in microphone for hands free call functionality. Tread the road that beckons, and take your music along. These headphones are all about low profile, lightweight execution. The super slim shape lends itself well to staying in place during your daily jaunt down to last call at Happy Hour, and the lightweight headband is coated with the same rugged, rubberized finish as many other Outdoor Tech products. Mountain tested, office appropriate. 100% business. Fully wireless, fully portable. The DJ Slims wirelessly connect with your smartphone, tablet, laptop, or any other Bluetooth enabled device. They stream crystal clear audio for a range of up to 30 feet for 9 hours on a single battery charge. So yes, you can ride the teacups and leave your phone on the park bench, but your phone may get stolen and you will probably not get a date for that sort of demonstration. We take responsibility for neither of these issues. Your headphones will stay on, though. Built in call functionality. When connected with your smartphone, the DJ Slims' built in microphone allows you to make and receive hands free calls from anywhere, any time. It's your dream come true, Hollywood. The sky is the limit. The DJ Slims are really all about versatility. Sure, they are super rugged and will stay on your head while you preponderate the bumper cars, but they also will hold their own around your neck while you talk science, art and leisure over bleu cheese martinis. Do what you do, the Slims have you covered. Details, details, details. Two 30mm drivers deliver the full range of clear sound, wirelessly. Connect to any Bluetooth enabled device with easy one touch pairing. External controls allow you to adjust volume, change tracks, playpause and answer calls. Rechargeable lithium ion battery. Built in microphone, because you've got lessons to teach. Reconnects automatically to previously paired device. Minimal and attractive design, with adjustable sizing. Driver Size: 30mm Impedance: 32 ohms1000Hz. Play Time: 8 9 hours. Standby Time: 254 hours. Bluetooth Profiles: A2DP for high quality stereo sound streaming AVCRP to control track and volume remotely. Wireless Range: up to 30 feet. Size: 6.3 X 6 X 1.2. Weight: 3.6 oz. Package Includes: USB charging cable, and user manual.