Eisco-Laboratory-Timer-&-Timing-Gate-Eisco-LBTM-V2-P-A-precision-digital-timer-designed-to-measure-the-time-interval-between-any-two-events-with-high-accuracy-P-P-The-timer-has-four-operating-modes-manual-free-fall-mode-timing-gates-mode-&-any-other-triggering-start-&-stop-P-P-The-timer-has-a-built-in-power-source-for-timing-gates-&-the-coil-for-g-by-free-fall-apparatus-P-Eisco-Laboratory-Timer-&-Timing-Gate