Endorsed by the World Sport Stacking Association (WSSA) as the official timing device for Sport Stacking, the StackMatTM Pro Timer is a detachable precision Competition Timer accurate to 0.001 with super sensitive touch pads.Note: The Gen 3 StackMat Pro Timer is only compatible with the Gen 3 Mat which is sold separately.Features: ** Accuracy to 0.001 seconds ** Memory feature to save your best times ** Data port to connect to external display ** Gen3 Graphics