Format: Enclosed Dynamic Stereo Headphone Driver unit: 40 mm diameter Frequency Range: 8 Hz to 30,000 Hz Impedance: 45 ohms (When detachable curl cord is used) Sound pressure sensitivity: 106 dB/mW Max Input: 2,500 Mw Weight: about 233 g (excluding codes) Accessories Detachable straight cord: approx. 1.2 m (3.5 mm diameter, stereo mini plug, 24 K gold plated, L shaped), detachable curl cord [On Stretch]: approx. 1.5 m (For attaching and detaching curl cords only) [Approximately 2.2 m], stereo mini standard plug adapter (3.5 mm diameter, stereo mini plug, 24 K gold plated, L shaped), carrying pouch