Koss developed the KDE/250 with a pair of dynamic transducers (sound drivers) that mount at a perpendicular angle. The larger 20mm transducer is low frequency dominant and ported while the 13mm transducer focuses on mid and upper frequencies in a side firing angle. This combination of transducers allows greater efficiency and accuracy across the entire musical spectrum to levels that exceed audibility. 3 pair of clips are included to provide a better customised fit. It can be adjusted for height with a special knurled knob on the element case assembly. Rotating the knurled knob dials in comfort for a perfect fit. Koss also developed a unique hinge mechanism to accommodate the intrinsic shape of the ear's tragus. This hinge plate allows the listener to modify the attack angle of the transducer as it enters the ear canal improving comfort, isolation and enhancing transparency. The KDE/250 allows listeners to enjoy a custom fit while experiencing the full scale of the musical sound stage.   Type Dynamic Driver Size ?mm Frequency Response 40~20,000 Hz Sensitivity 95 dB/mW Impedance 16 ohm Output ? mW Cord Length, Shape Straight, Dual Entry, 4ft Weight ? g Weight in Retail box 150g

Contents .. Koss KDE250 InEarphones with 4 feet cord ending in stereomini plug 3 pairs of ear clips Pouch We are Authorized Reseller. International & Singapore Lifetime Warranty Singapore: Liase with local distributor as instructed in warranty card. International: Liaise with your regional Koss. If unavailable, we can help you liaise with the Singapore distributor for a fee of SG$20. You will pay for postage to/from our Singapore office.