The GraLab Model 451 solid state digital timer is an excellent choice for factory, lab or studio use. It has two independent, programmable memories for single cycle switching or continuous cycling. The Model 451 electronic timer is 100% solid state for digital accuracy and repeatability. It has a simple design with highly visible two-digit LED display that makes time setting easy. The 99 minute time range can be set in minutes, seconds and 1/10 seconds.