An affordable, durable, reliable, easy-to-use portable instrument for detecting the presence of O2, H2S, CO and combustible gas. It is designed to withstand rough handling in harsh environments while delivering MSA's commitment to quality at the smallest size and even smaller price. It offers the best and biggest array of features on the market while weighing under eight ounces and measuring 4-1/2”H x 2-1/2”W x 1-1/4”D. Features flexibility, a world-class alarm system, versatile display, simple calibration and long-life battery. Offers an optional sampling pump and an outstanding two-year warranty.