This is the FiiO K9 Pro LTD headphone amplifier. It's a limited edition model equipped with the AK4499EQ DAC and THX AAA 788+ amplifier. It was used in a non-smoking environment, and all accessories are included. I purchased an extended warranty from Bic Camera at the time of purchase, and it is valid until December 9, 2026. I will include the documentation with the long-term warranty number, so please present it to Bic Camera if you need to use the warranty.