Wireless Timing Mats PackThis easy to use wireless Bluetooth sensor comes with one wireless switch adaptor, and a pair of large timing mats (720 x 390 x 3 mm). Perfect for bringing your physics lessons to life, students will love the range of experiments they can participate in with these timing mats! Use these timing mats for all kinds of fun, engaging experiments: Which students can move between two points the fastest? How long does it take to jump between two points? How