Soft suede and leather ear cushions (interchangeable). Leather hard travel protective case. Gold plated adapter. Features: RockvilIe PRO-M50 Studio Headphones w/ Detachable Coil Cable, Case+Extra Ear Pad. Professional High-Definition Studio Headphones. 40mm Neodymium drivers. Ergonomically designed swivel ear cups. Supreme sound isolation. Accurate sound reproduction. Minimal bleed. Sturdy and durable steel headband and arms. Soft leather headband cover. Interchangeable leather and soft suede ear cups covers included. Detachable 51 coil cable made of 100% Oxygen Free Copper (158 fully extended). Gold plated 3.5mm connector. Gold plated adapter. Hard leather carrying case. Stainless steel headband frame and moving arms are durable and long-lasting. Specifications: Style: Closed-Back. Design: Circumaural. Transducer Type: Dynamic. Driver: 40MM. Sensitivity: 973dB. Impedance: 32ohm. Frequency Response:10Hz 25KHz. Max. Power: 600MW. Rating Power: 260MW. Net Weight:290g (with cable) Audio-Technica's System 9 is a four-channel frequency-agile wireless system designed to provide rock-solid performance along with easy setup and clear, natural sound quality. Featuring sleek, stackable, contemporary styling, System 9 is available in a head worn configurations. The system offers four compatible user-switchable channels. Each System 9 configuration includes the ATW-R900a receiver and either a body-pack transmitter or handheld microphone/transmitter. The ATW-R900a is a non-diversity, single-channel receiver with advanced dipole antenna design for extended operating range, which improves operation by providing a ground element in addition to the usual signal element. The ATW-R900a also offers volume control along with AF Peak, RF and Power indicator lights.