55ohms rated impedance, dynamic, 114dB/V sensitivity, frequency range: 18Hz-24kHz, gold plated 1/8" to 1/4" screw-on adapter. Ideal for monitoring, 200mW maximum input, 3m jack cable with 3.5mm stereo mini-plug. Includes 1 pair of velvet pads, recording, playback and portable equipment. Weight: 225g (without cable).