Digital-Stopclock-with-External-Trigger-Rapid-TM-20A-p-The-TM-20A-is-a-high-accuracy-easy-to-use-unit-that-can-be-used-either-as-a-standard-timer-or-may-be-automatically-started-and-stopped-by-an-externally-connected-device-p-Rapid-TM-20A-Digital-Stopclock
Digital-Xenon-Stroboscope-Standard-Version-Rapid-52-2677-p-This-digital-xenon-stroboscope-is-a-lightweight-sturdy-and-compact-instrument-which-features-a-digital-variable-flashing-rate-adjustment-and-external-triggering-facility-The-bright-xenon-tube-makes-it-ideal-for-educational-uses-for-such-as-wave-motion-and-vibration-experiments-p-Rapid-Digital-Xenon-Stroboscope-60-to-18-000-RPM
Learning-Resources-Simple-Stopwatch-Learning-Resources-LER0808-P-Timing-practice-even-youngsters-can-master-P-P-This-simple-stopwatch-features-just-three-easy-to-use-buttons-green-for-go-red-for-stop-and-yellow-for-clear-and-a-large-easy-to-read-digital-display-that-shows-minutes-seconds-and-hundredths-of-a-second-P-Learning-Resources-Simple-Stopwatch