A groundbreaking new optical sensor designed by Logitech G. It delivers class-leading performance and power efficiency up to 10 times that of previous generations. In addition to outstanding accuracy, it delivers consistent performance with zero smoothing, zero filtering, and zero acceleration at all DPI (200 to 12000). You can store up to 5 profiles in onboard memory and set up to 5 DPI for each profile. Logitech game software is required for advanced settings (downloadable from support.logicool.co.jp/ja_jp/software/lgs) Through LIGHTSPEED wireless end-to-end engineering and design, Logitech G has developed a stable wireless solution that solves basic latency, stability, and connectivity issues. The result is a wireless mouse that delivers professional performance comparable to wired. Can be used continuously for a very long time The combination of the HERO sensor and LIGHTSPEED wireless has achieved unmatched power efficiency that can drive for months. With just one AA battery, it can be used continuously for up to 250 hours. If you choose Endurance mode in your Logitech gaming software, you can continue to use it for up to 9 months without battery replacement for normal use. 3 Logitech G240 Gaming Tested on a mouse pad will notify you when the battery level reaches 15% with the Logitech Gaming Software and the G304 indicator light. The ultra-lightweight Logitech G doesn't make the chassis heavy with wireless as an excuse. The lightweight design and unrivaled power efficiency of the G304 have made it astonishingly light at just 99g. 6 programmable buttons Equipped with a middle button, DPI button, and two side buttons in addition to the left and right mouse buttons that have passed the 10 million click endurance test. Each button can be customized to your liking with Logitech G HUB. Logitech game software is required for advanced settings (downloadable from support.logicool.co.jp/ja_jp/software/G HUB) Mechanical Button Tensioning Mechanical button tensioning on the left and right buttons keeps the weight of mouse button clicks constant and allows for less force to click. It provides a crisp click and high reliability, no matter how intense the playing environment. Designed for portability The durable and lightweight housing is equipped with a USB ultra-compact receiver storage pocket that is extremely convenient to carry.