* 2 in 1 (Engine & Laser tachometer ) * Digital display gives exact reading with no guwssing or errors. * Wide measuring range & high resolution. * The Last Values / Max. Values / Min. Values of both Humidity and Temperature will be automatically stored in memory and can be displayde by turn. * The use of durable,long-lasting components, including a storng,light weight ABS-plastic housing assures maintemance free performance for many years.The housing has been carefully shaped to fit comfortably in either hand.