Used only a few times and then stored at home. Comfortable design born from the shape of the hand. This is a medium-sized model from ELECOM's popular "EX-G" series. Equipped with a high-precision Blue LED sensor and durable OMRON switches. With side buttons, it also improves the efficiency of web browsing and work. [Product Information] ・Model Number: M-XGM10DBBK ・Size: M size (Width 73.8 x Depth 109.6 x Height 40.8mm) ・Connection Method: Wireless 2.4GHz (USB receiver included) ・Number of Buttons: 5 buttons ・Supported OS: Windows / Mac / Chrome OS ・Batteries Used: 1 x AA battery (included, remaining power unknown) ・Color: Black Please refrain from price negotiations. Thank you very much.