Thank you for viewing! This is the Hitec Charger AA/AAA Charger X4 Advanced EX and XLINK. It allows for charging that provides punch for Mini-Z and other models. Here are the specifications: https://hitecrcd.co.jp/products/x4_advancedex/ https://www.hitecrcd.co.jp/products/hitec-xlink/ I purchased this new a little over a year ago and used it for about six months. There are absolutely no issues with its operation. Includes the instruction manual and box. The XLINK is very convenient, allowing you to easily configure settings that are not possible on the main unit via your smartphone. The cable connector port that connects the main unit and XLINK has been glued to prevent it from coming loose. It is usable, but if you are concerned, you can purchase a replacement for a few hundred yen. (Micro to micro cable) I am selling this to clear out my inventory. Thank you for your consideration. Note: I don't think the main unit smells, but please refrain from purchasing if you are concerned about general household odors.