Here are the key features and specifications of the Beyerdynamic DT 770 Pro headphones:
Driver Type: Dynamic
Driver Size: 45mm
Impedance: Available in 32 ohms, 80 ohms, and 250 ohms models
Frequency Response: 5Hz – 35kHz
Sound Signature: Bass emphasized with bright treble
Earcups: Circumaural (over-ear), closed-back with perforations
Earpads: Soft velour pads
Cable: Coiled (32/80 ohm) or straight (250 ohm)