We haven't had a chance to fully test this product yet, but we've assembled this helpful overview of relevant information on it.
Turtle Beach Ear Force XP400
Turtle Beach’s Ear Force XP400 over-the-ear headphones offer an in-line remote and microphone and utilize wireless technology. Additional features include a frequency response range of 20 – 20,000 Hz, as well as cushioned ear pads.
May 18th, 2012
Frequency Response Range
20 – 20,000 Hz