Lightspeed ships with 4g weights, but you can't physically put them in the mouse. : r/G502MasterRace
Buy Logitech G502 Wireless Gaming Mouse - Microsoft Store
Logitech G502 Lightspeed review: A wireless gaming mouse that's just as responsive as a wired one | Windows Central
Amazon.com: Logitech G502 Lightspeed Wireless Gaming Mouse with Hero 25K Sensor, PowerPlay Compatible, Tunable Weights and Lightsync RGB - Black : Video Games
Amazon.com: Logitech G502 Lightspeed Wireless Gaming Mouse with Hero 25K Sensor, PowerPlay Compatible, Tunable Weights and Lightsync RGB - Black : Video Games
Logitech G502 X PLUS LIGHTSPEED Wireless Gaming Mouse with HERO 25K Sensor Black 910-006160 - Best Buy