I purchased this new on September 29th of this year from Rock Online as a sub-unit, but I am selling it due to a change in environment. Since I bought it, I have only tested it indoors, and it has not been taken out, so it is almost new. Also, I have not registered the product with Motu, so if you register it, you can use all the included software. The USB cable is also unused. As a bonus, I will include a Unibrain USB 3.1 cable 1m. I have confirmed the operation of everything except the RCA terminals. The main unit is very clean with no scratches, stains, damage, or defects. The microphone preamps, DI, and DA quality definitely have the potential to rival higher-end or high-grade models. By implementing an external power supply and jitter removal measures, it will definitely perform excellently. I will disinfect and clean it before shipping. If you purchase it by 3 PM, I will ship it the same day. I cannot offer a discount. Product Contents Motu M4 Main Unit - Purchased for 47,960 yen USB Cable (Unused) Manual, Warranty, Box Set Bonus Unibrain USB 3.1 Cable 1m type-C-type-C 4,400 yen