For the party DJ who needs to hear sounds over the ambient noise, the Beats by Dr. Dre Mixr over-the-head headphones in black deliver extreme levels of sound, yet are clear and undistorted no matter what the volume of the surroundings. These Monster headphones have a frequency response of 10 Hz to 20 kHz +/- 3 dB, meaning bass is tight and crisp, and midrange and high frequencies are clear and undistorted. Aimed at the DJ market, the Beats by Dr. Dre Mixr over-the-head headphones have swiveling ear cups that swivel back behind the ears and rotate back to provide complete isolation from the surrounding noise. These Monster headphones also have dual inputs and daisy chain connectors, which allow more than one listener to enjoy the music. They are incredibly durable and able to stand up to the rigours of even the most extreme handling. These Monster headphones have a 1.6-m long cable terminating in a standard 3.5-mm stereo jack plug for connection to most portable music systems and mobile phones. They are only 197 mm high and weigh just 210 g.