AKG K361-BT Professional Studio Headphones strike the perfect balance between professional-grade quality and consumer-friendly fit, comfort and portability. Combining cutting-edge performance, Bluetooth connectivity, extended frequency response and supreme comfort in a closedback, over-the-ear, folding design, the K361-BT headphones are perfectly suited for life in the studio or on the go. Content creators and musicians need headphones that deliver uncompromising fidelity and performance while standing up to their mobile lifestyles. Whether youre an artist, producer or discriminating audiophile, you can trust K361-BT headphones to reproduce natural, balanced audio, precisely as intendedanytime, anywhere.Main Features:Closed-Back, Over-Ear Design: Oval earpads and a closed-back, over-ear design provide superior isolation and improved bass responseLargest-In-Class Drivers: 50 mm drivers provide superior performance and extended bass responseWired or Wireless Listening: Listen via Bluetooth with 24-hour battery life, or connect using one of the included cablesFoldable, Notched Hinge: 3-position articulated hinge, collapsible for maximum portabilitySlow-Retention Foam Earpads: Superior comfort and fit for longer listening sessions with less bass leakageSleek Style: Pro performance with lifestyle fit and finishSpecifications:Headphone type: Closed-backDriver size: 50 mmVoice coil: Pure OFC voice coilConnectivity: Wired and Bluetooth 5.0Battery Life: Up to 24 hoursConnector: 1/8 (3.5 mm) TRSFrequency response: 15 Hz 28 kHzSensitivity: 114 dB SPL/1 V @ 1 kHzImpedance: 32 ohmsWeight: 260 grams (9.2 ounces)