Logitech G603 wireless gaming mouse review | Rock Paper Shotgun
Logitech G603 Lightspeed Wireless Gaming Mouse : Logitech G603/G613 wireless gaming mouse and keyboard review: Is it possible to game without wires? - HardwareZone.com.sg
Unboxing and Review of Logitech G603 Wireless Gaming Mouse | UnbxTech
Logitech G603 Lightspeed Mouse - ElectroMall
Amazon.com: Logitech G603 LIGHTSPEED Wireless Gaming Mouse, HERO 12K Sensor, 12,000 DPI, Lightweight, 6 Programmable Buttons, 500h Battery Life, On-Board Memory, PC/Mac - Black : Video Games
G603 weight reduction project (with pictures and instructions) : r/MouseReview