Logitech G309

Dual-wireless connectivity: uses the LIGHTSPEED 2.4 GHz USB receiver for low-latency gaming and also supports Bluetooth LE. Premium sensor: the HERO 25K optical sensor supports 100–25,600 DPI, >400 IPS speed and >40 G acceleration, with zero smoothing/filtering. Hybrid switches: features LIGHTFORCE optical-mechanical switches for fast click detection and tactile feel. Lightweight design: weighs about 86 g with a standard AA battery, or 68 g when used without the battery (e.g., with the optional wireless-charging mat). Onboard memory & customization: supports up to 5 customizable profiles via Logitech G HUB software, and has PTFE feet for smooth gliding. Long battery life: up to 300+ hours in LIGHTSPEED mode and up to 600+ hours via Bluetooth (actual life may vary).