Speed Stacks G5 StackMat is only compatible with the G5 timer. The Speed Stacks timer is the only timer, which is approved for official WCA competitions. The G5 Speedcubing mat is designed for speedcubing, and the G5 StackMat is designed for cup stacking.
G5 Pro Cube Pack (Sport Stacking)
Speed Stacks G5 Speedcubing Mat Grey → MasterCubeStore
Speed Stacks, G5 Timer, Endorsed by Sport Stacking and Cubing associations
Speed Stacks - Pro Cube Pack (Timer, Mat & Bag) → MasterCubeStore
Speed Stacks G5 Speedcubing Mat Grey → MasterCubeStore
Speed Stacks - Pro Cube Pack (G5 Timer, Stackmat → MasterCubeStore
Speed Stacks StackMat Pro Mat G5 []
Speed Stacks G5 Speedcubing Mat Grey → MasterCubeStore
Speed Stacks, G5 Stackmat (Timer and Mat), Accuracy to 0.001 seconds, batteries included
Speed Stacks, G5 Timer, Endorsed by Sport Stacking and Cubing associations
The Speedstacks Pro Cube Timer Bundle G5 comes with everything you need to practice for your next WCA competition. G5 Timer - Speed Stacks Timers are
G5 StackMat Pro Timer with Mat and Carrying Case