Endorsed by the World Sport Stacking Association (WSSA) as the official timing device for Sport Stacking, the G5 StackMat combines a detachable precision Competition Timer accurate to 0.001 with super sensitive touch pads and an "optimum" stacking surface.<br/> <br/> The new Speed Stacks G5 Timer is the next step in the evolution of sport stacking. The patented four-pad activation system eliminates a whole class of scratches by ensuring that hands can’t be holding cups when starting and stopping the timer. Other G5 features include:<br/> <br/> Two operation modes: 4-Pad (for stacking) and 2-Pad (for speed cubing). Just hold the RESET button for 5 seconds to switch modes.<br/> <br/> RESET and POWER buttons have a new reinforced design that won’t wear through with extended use.<br/> <br/> Hold-feature on RESET and POWER buttons prevents lost times when a timer is slammed.<br/> <br/> TD cord plugs in underneath the timer so it’s out of the way and doesn’t accidently get unplugged.<br/> <br/> A new snap-in G5 button system eliminates timers getting knocked off the mat inadvertently.<br/> <br/> New G5 mat shape, which is the same size as the G4 mat, but with more room in the corners.<br/>