Seems to be the lowest price.
LIGHTSPEED Experience LIGHTSPEED wireless technology for super fast 1 ms report rate
Romer-G Romer-G mechanical switches deliver quiet, precise mechanical performance and 70 million click life for incredible feel and durability
Programmable G Keys Six programmable G keys put custom macro sequences and in-app commands at your fingertips.1 Customize G key profiles individually for each app
Multihost 2.4GHz + Bluetooth Connect to multiple devices with LIGHTSPEED for super fast 1ms report rate and Bluetooth connectivity