Single dynamic driver in-ear by Korean micro-speaker company called Dynamic Motion.
Ear-Clip Headphones for Light Sports With Bass Enhancement. JVC Xtreme Xplosives Inner Ear Headphones. Cordless: No. Headset Type: Headphones. Extreme deep bass ports and 8.5mm Neodymium driver units. Rubber protectors for durability. Superior sound isolation. Ergonomic contoured comfortable form. Cord length: 1.2m with gold plated slim plug. Includes 3 sizes silicone earpieces