Product Detail:-Brand Name: pisen-Model Number: HD300-tyle: Headband-Communication: Wired-Connectors: 3.5mm-Use: Mobile Phone-Function: Noise Cancelling-connetor: 3.5mm-Impedance: 32?±15% 1000Hz-Frequency response: 20Hz-20KHz-Sensitivity: 108±3db, 179mv, 0db=20 ?pa-Size: 183*163*65mm-N.W.: 152g-Rated power: 5mW-Max power: 10mW   Specifications:*3.5mm wired Stereo Headphones *Comfortable for long use--Earmuffs rotary-type humanized design, soft leather cushion, stainless steel telescopic bracket , 100% fits  your head  --High quality TPE environmental protection wire, soft, flexible winding, bending resistance, long service life*Convenience--1.5m long cable that is ideal for outdoor use--Flat foldable for you easy to carry on the go*Perfect listening experience--Using 40 mm high quality strong magnetic ndfeb unit, acoustic field is open, the bass strong--The standard 3.5 mm gold-plated plug, high-fidelity signal transmission;