* Used the exclusive MICRO-COMPUTER LSI circuit and crystal time base to offer high accuracy measurement & fast measuring time. * Wide measuring range & high resolution. * Digital display gives exact reading with no guessing or errors. * The maximum value during the measurement will be automatically held in memory and be controlled by Hold key. * The use of durable, long lasting components, including a strong, light weight ABS-plastic housing assures maintenance free performance for many years. The housing has been carefully shaped to fit comfortably in either hand. * It meets requirements of IEC651 for type II sound level meter.