This is a set of iFi's ZEN DAC Signature V2 and ZEN CAN Signature MZ99. The ZEN DAC Signature V2 provides high-quality digital audio conversion as a Hi-res DAC, and the ZEN CAN Signature MZ99 can be used as a Balanced Headphone Amp/Pre-Amp for headphones or as a pre-amp. Both support Hi-Res AUDIO, allowing for a high-resolution sound experience. As a bonus, I'm including a balanced 4.4mm to 4.4mm cable to connect the two devices, and a brand new USB cable. Used for one and a half years. Please understand that this is a used item before purchasing. I am also selling on other flea market sites, so a quick comment would be appreciated. No returns or refunds. Audio DAC [Brand] iFi audio [Category] Headphone Amplifier, DAC [Color] Gray系 (Gray-toned) [Other] Hi-Res AUDIO compatible Thank you.