The high sensitivity of the Ortofon O2 headphones allows you to use them with any DJ mixer and can even compensate for mixers no matter what the quality of the headphone amplifier. The Ortofon O2 is perfect for use with a virtually unlimited array of equipment including portable music players. The inclusion of a gold-plated 3.5/6.3mm jack adaptor ensures compatibility with virtually any audio device. Additionally, its 114dB SPL guarantees that when you're DJing you can achieve the volumes you require, regardless of environment ? club, studio, or home. The Ortofon O2's rugged and durable headband and earcup construction ensures hard-wearing, road worthy performance. With their closed design and flexible earcups, you can choose the amount of isolation you require for cueing and mixing. With highly accurate sound reproduction, the Ortofon O2 sonic capabilities will be applauded by DJs, musicians, and discerning listeners alike. The sound is optimized for DJing and mixing which allows you to distinctly hear the details you want to focus on without losing control of other aspects of the sound.Enclosed accessories: jack adapter, gold-plated 3.5/6.3mm Transport bag