HERO sensor is the next-gen optical gaming sensor from Logitech G that accomplishes both incredible performance and unprecedented efficiency. Because, in wireless gaming, there can be no compromises. The meticulously engineered, end-to-end solution from Logitech G gives players the freedom of wireless and the 1 ms performance required for gaming. HERO Sensor and LIGHTSPEED deliver extreme efficiency to let you game for 250 hours on just one AA. Expect around 9 months of typical use, at peak performance, before needing to change your battery.2 And don’t worry, G304 has an indicator light that reminds you at 15% battery remaining. At Logitech G, a wireless gaming mouse doesn’t need to be heavy. G304 is very light, coming in at only 99 grams, made possible thanks to the lightweight mechanical design and ultra-efficient battery usage. G304 sports 10 million click switches for the two primary buttons. G304 also has middle click, DPI button and two side buttons that can be programmed to your liking using Logitech Gaming Software.1 Advanced button tensioning with separated buttons enhances the consistency of the left/right mouse buttons and helps reduce the force needed required to click. This results in crisp, reliable click performance you can depend on in even the most intense gaming sessions. The durable, lightweight design with a small footprint and built-in nano receiver storage make G304 a great travel companion