AKG K361 BT Bluetooth Studio Headphones, Over Ear Closed Back Design for Professional Performance, Foldable with 3 position hinges, 28 hour battery life, Built in Microphone, Earcup Gesture Controls

Closed-back, oval over-ear design offers superior isolation, improved low-frequency response, ergonomic fit Largest-in-class, 50mm transducers with pure OFC voice coils Superior sensitivity (114 dB SPL/V @ 1kHz) and impedance (32 Ohms) for use with professional and consumer devices Best-in-class frequency response: 15 Hz to 28 kHz Calibrated headbands with slow-retention oval foam pads offer precise fit, superior comfort Fully foldable design for compact storage with 90 degree swivel ear cups for single-ear monitoring Ultra-light weight: 219 grams (7.7 ounces)