Audio Technica ATHA500X Audiophile Closed-Back Dynamic Headphones Art Monitor Headphones | Closed Dynamics Type Driver: 53mm, Frequency Response: 5-30,000Hz, Impedance: 48ohms Max Input: 500mW, Output SPL: 100dB/mW, Weight: 290g (w/o Cord), Plug: STANDARD/MINI gold-plated STEREO 2-WAY Cord-length: 3.0m 1 year Japan warranty