Black. Next-generation HERO sensor delivers incredible performance and up to 10x the power efficiency over previous generations. HERO is an optical sensor capable of exceptional accuracy and responsiveness with 400 IPS precision and up to 12,000 DPI sensitivity. LIGHTSPEED? Wireless Ultra-fast LIGHTSPEED Wireless technology gives you a lag-free gaming experience. G305 delivers incredible responsiveness and reliability with a super fast 1 ms report rate for competition-level performance. Ultra-Long Battery Life Play at peak performance without worrying about running out of power. G305 boasts an incredible 250 hours of continuous gameplay at 1ms report rate in Performance mode on just one AA battery. G305 has a battery indicator light that flashes red at 15% battery remaining. Switch to Endurance mode via Logitech Gaming Software and extend battery life up to 9 months on a single AA battery. Endurance mode reports at 8 ms.