Beats by Dr. Dre Solo 2 Wireless Black On-Ear Headphones Carry Bundle with Wire Holder Featuring Bluetooth technology, Solo2 Wireless is advertised to allow free movement within 30 feet from an audio device. Users can take calls, skip songs, and change the volume using the "b" button and volume buttons on the ear cup. The internal rechargeable battery allows users up to 12 hours of wireless playback. And if the battery is dead, users can plug in the "RemoteTalk" cable to listen to music. Immerse yourself in an emotional experience. The Solo2 has a more dynamic, wider range of sound, with a clarity that will bring you closer to what the artist intended. Engineered for comfort. Starting at the center of the flexible headband, the frame of the headphone has been curved like never before, giving the Solo2 a custom-fit feeling. Think luxury sports car. The Solo2 boasts a streamlined aesthetic with fast flowing curves and no visible screws.