The Shure SRH940 Main Features:

For Studio Monitoring and Mastering
Accurate frequency response delivers smooth high-end extension with tight bass, and superior transient response for minimal distortion
Lightweight, ergonomic fit with premium padded headband provides superior comfort over extended periods
Closed-back, circumaural design rests comfortably over the ears and reduces background noise
Collapsible design with 90-degree swivel ear cups for easy storage and portability
Replaceable velour ear pads ensure long product life
Two included detachable cables provides plenty of length and flexible wearing options
Zippered, hard travel case protects headphones when not in use
Transducer Type: Dynamic, Neodym-Magnet
Driver size: 40 mm
Sensitivity : 100 dB SPL/mW
Impedance: 42 Ohm
Max. input power: 1000 mW
Frequency range: 5 Hz - 30 kHz
Net weight (without cable): 322 g
Cable length: 3 m, 1,37m m
Type of cable: Detachable, coiled
Plug: Gold-plated 3.5 mm stereo mini plug