The G5 timer has two modes: 4-Pad mode (for stacking) and 2-Pad mode (for speed cubing, where it operates just like a G4 timer).

https://www.speedstacks.com/news/2021...

Speed Stacks, in partnership with the World Sport Stacking Association is excited to announce a big step in the evolution of sport stacking.

NEED CUPS?
Speed Stacks Store - https://www.speedstacks.com/store/ret...
Or on Amazon:
Competitor: https://www.amazon.com/dp/B00LG3C292
Set: https://www.amazon.com/dp/B008E53AFK
StackMat: https://www.amazon.com/dp/B0182KR2LO
G4 Timer: https://www.amazon.com/dp/B00ADUXF5E