Professional Over-the-Head DJ Headphones Padded adjustable headband to fit most heads Cushioned ear pads for comfortable listening sessions.Closed-back design Swiveling ear cups for easy single-ear monitoring Driver Units : Dia 50 mm Cobalt Magnet.Impedance : 60 Ohm /- 5% Frequency Response: 18-20,000 Hz Sensitivity: 110 dB Max Power: 100 mw The DJH-200 headphones from DJ-Tech provide the quality and features needed by the professional DJ. The headphones have 50mm cobalt magnet drivers to deliver crisp, clear audio with thumping bass response. The closed-back design and thick on-ear cushions help to block out environmental noise, letting you focus on your mix. The ear cups have a swivel mechanism for easy single-ear monitoring. The padded, adjustable headband provides hours of comfort, perfect for going through long sessions without fatigue.