Compact, lightweight, Stereo Headphones for monitoring, recording and home applications. Neodymium magnet for high sensitivity, dynamic sound and deep bass response. Comes with the adapter so that the headphones can be used with either a mini jack or standard 1/4" jack socket. With the built in volume control on the cable and a 3m cable these are very useful, convenient headphones. Finished in Black and Silver these look great and deliver solid sound. Specifications Adjustable volume control Type: Dynamic, "closed back" design Driver unit: 40 mm (1" 5/8) diameter Impedance: 32 Ohms @1Khz Sensitivity (SPL): 102 dB/mW @ max.power Power handling capacity: 80 mW max. Frequency response: 20 Hz 20 kHz @ -3dB Cord length: 3m (10 ft) long Plug: 1/8" Stereo mini-plug ( 3,5mm) Weight: 125 g (4.4 oz.) w/o cord; 175 g (6.2 oz.) net Accessory: 1/4" ( 6,3 mm) Stereo jack plug adapter