Hard-to-find NeotenicSound AcoFlavor (signal conditioner) and RushUp (booster) Sold as a set. Both units have been tested and are confirmed to be working. Comes with original boxes. When turning the "fit" knob on the AcoFlavor, a small popping noise can be heard. However, this also occurs on two other units I own, so it appears to be a design feature. Of course, once you set your desired configuration, it can be used without issue. AcoFlavor original price: ¥30,800 RushUp original price: ¥19,800 Both the AcoFlavor and RushUp were purchased used. As I am not in a hurry to sell, the current price is firm. I will typically ship within 1-2 days. However, as I am shipping from a remote island, if the shipping method switches from air to sea freight, delivery may take 7-10 days. Please be aware of this in advance. Please understand that these are used items and refrain from purchasing if you are sensitive about condition. I appreciate your smooth cooperation through to the receipt confirmation. Thank you.