HERO SensorHERO sensor is the next-gen optical gaming sensor from Logitech G that accomplishes both incredible performance and unprecedented efficiency in your Logitech G304. Because, in wireless gaming, there can be no compromises. Program DPI from 100 – 12,000 and save upto 5 profiles on the onboard memory.Lightspeed WirelessLightspeed is wireless as fast as wired. The meticulously engineered, end-to-end solution from Logitech G gives players the freedom of wireless and the 1 ms performance required for gaming.Ultra-Long LifeHERO 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. Logitech G304 Gaming Mouse has an indicator light that reminds you at 15% battery remaining.