HIFIMAN offers great deals on returned or refurbished products. Those products are tested and in good condition but do not meet HIFIMAN's standards as "new".
Those products, with full accessories (and with box), will be available for the U.S. only.
Used products do not come with HIFIMAN's standard warranty but if you are not satisfied with the product for any reason, you can return or replace the item in 30 days.
What makes HE400 special is:
1) it is 92.5dB efficient so it can be driven by virtually anything including an iPod.
2) It has the familiar HIFIMAN sonic signature which means it is very detailed yet warm
3) We price it at such a price because we finally figure out a way to mass produce hi-end sound quality planar driver headphones in a much easier way than before.
Sensitivity: 92.5 dB
Impedance: 35 Ohm
Weight: about 440 gram (14.5 Oz)
Frequency response: 20Hz -35 KHz
OFC copper headphone cable (3 meters or 10 Feet)
Leather earpad one pair
1/4"(6.35mm) headphone adapter