Wireless Gaming Mouse Accessories For Logitech G502, it is equipped with 5 weight blocks, and the weight of each weight block is 3.6g. Open the weight compartment cover on the bottom of the mouse and adjust the number of weight blocks. You can directly open the bottom cover and push in the weights. There are grooves installed inside, which can just catch. It can be easily opened, and it is very convenient and fast to use. For Logitech G502, the 5 weight blocks are the most comfortable, and you can individually adjust the weight and center of gravity position. G502 adapts to the weight of the gaming mouse, and better improves the balance and tracking surface adaptability, and meets the precise needs of each player as much as possible. For Logitech G502 / G502 HERO Gaming Mouse [About the product] ○ Free shipping ○ Immediate purchase OK ○ Ships via Rakuraku Mercari. Anonymous shipping. Yamato guarantee included. [Notes] ・I do not have knowledge about this product, so I may not be able to answer questions. ・Everything in the photos is included. Since I take photos with a smartphone, there may be slight differences in color. ・There are scratches. ・Regarding product details, I have asked or researched them myself, so please understand that there may be errors. ・Please consider this item after understanding that it has been in someone's hands once. Please refrain from purchasing if you are nervous.