Shipping method: To US, Canada and Russia: USPS To any other countries: International Express mail (EMS, UPS, DHL or Fedex)
Warranty Policy: 30 days refund: shipping cost is not refundable. 1 year replacement. The cost to ship a product back to us for repair, replacement, refund, exchange or upgrade is the responsibility of the consumer. The cost to return the product to the consumer is the responsibility of Head Direct/HiFiman
Ultra low distortion, low impedance for high grade portable audio
PK2 earphones are the low impedance version of PK1. Although not as good as PK1, PK2's sound signature is similar to PK1. You don't have to drive PK2 with an expensive head-amp. If you are looking for something with high performance/price ratio, PK2 might be the best choice.