Thank you for viewing this product. This is a set sale of: ・amPlug2 Bass (Amazon price: ¥7,360) ・amPlug2 Cabinet2W (Amazon price: ¥4,950) (A cable to connect the two amps is also included). Both have been used only 2 or 3 times, and the product condition is good. The sound quality is surprisingly good for its size, and I recommend it because you can practice bass anywhere without sound-related stress. Also, the design is good, so it looks great as interior decoration. The amPlug2 Bass can be used on its own by plugging it into a bass and connecting headphones. It can also be used as a mini-amp by connecting it to the amPlug2 Cabinet2W. The box and instruction manual are only available for the "amPlug2 Cabinet2W" and will be included. The "amPlug2" will be shipped in simple packaging. Please be aware of this. The batteries will be removed considering shipping. Headphone amp: 2 AAA batteries Mini-amp: 1 9V manganese dry cell battery It runs on these. The total cost would be ¥12,930 if purchased at Amazon prices, but it is being offered here for ¥8,600, so you can purchase it at a great value. Thank you.