Features Sony presents the all-new 2004 MDR-NX1 Neck Strap Earphone that features a high quality earphone and a neck-strap combined as one. With an unique design and also gives out crystal-clear sound plus noise-canceling effect. It is light weight easy to carry and great for traveling. Specially designed for MP3 players. NOTE: Sony MDR-NX1 is an In-Ear type earphones. Earbuds are meant to be inserted COMPLETELY into the ear canals for best performance. Specifications Type: Lateral In-the-ear Closed Dynamic Driver Unit: 9mm diameter Cord: OFC 1.5 litz wire Plug: Gold-plated L-Shaped stero Mini Plug Mass: Approximately 4g