1.Accurancy 1% and High reliability 2.Clamp-on Sensor 3.SD card 4.Ni-H battery ... 0.5%, repeatability: 0.2%Non-intrusive measuringNon-intrusive, clamp-on transducer, no pressure drop, no pipe disturbance.Wide measuring rangeSeveral ... -232 interface. 75-57600bps, compatible with Fuji ultrasonic flowmeter and other UFM on enquiry.TransducersModel M1 for standard, other 4 models ...