This 'Timer-Counter / Frequency' is a very compact and powerful instrument that runs from a 240V.AC. mains. The smaller, low voltage model of this timer is LB4063-001. It has a bright red LED 6 digit display and times up to 99.9999S with a resolution of 0.1mS (0.0001S) and continues to 999.999 by 1mS (0.001S). A 'mode' button permits timing of Stop/Start, PhotoGate, Period and Pendulum (see PDF file for full information). Memory is stored up to 20 readings. The Counting function can be set to Continuous Count, Counts over 100S, Counts over 10S, Counts over 1S (or frequency in Hz). A rotary control permits sensitivity adjustment of the counting input. An excellent and very versatile instrument.