Linearity 0.5% Repeatability 0.2% Accuracy ± 1% of indicated value, velocity> 0.2 m / s response time 0-999 seconds, users are optional. Flow range ± 32 m / s pipe size 20mm-6000mm measurement in meters, feet, cubic meters, liters, cubic feet, US gallons, UK gallons, drums, barrels of liquid United States, the United Kingdom liquid barrels, US trillion gallons, user-specified units. Accumulator 7 positive, negative and net cumulative Liquid various types of liquid locking security settings, and change the data required to unlock. 4x8 or 4x16 display Chinese English communication interface RS-232C, baud 75-57600, compatible Fuji ultrasonic flowmeter can also be compatible with other products the user's requirements. Standard M1-type sensor, while the other three kinds to choose from. Sensor cable standard 5 meters x2, can also be extended to 10 meters x2. Power supply 3 AAA built-in Ni-H battery, each full charge lasts about 12 hours, 100V-240VAC adapter built-in data logger data logger can record 2000 lines of data. Manual accumulator 7, a button you can start for calibration. Case material ABS Dimensions 100x66x20mm Weight 516g (1.2 lbs) including batteries