From the manufacturer:

MAX FLEXIBILITY

Play with the low-latency, reliability, and wireless freedom of LIGHTSPEED wireless or switch to universal Bluetooth connection for even more wireless flexibility.

MAX SPEED

Optimise speed, performance, and feel with LIGHTFORCE hybrid switches combining the responsiveness of optical and the tactile feel of mechanical for pure play.

MIN WEIGHT

Minimise the delay between your reflexes and the movement of G309 LIGHTSPEED with a lightweight 86 g design (when powered by a single AA battery).

MAX POWER

Shave even more weight and maximise performance by removing the battery and pairing with POWERPLAY wireless charging system (sold separately) for a 68 g weight.

Technical Details:

Warranty: 2 Year Limited Hardware Warranty