Connection:3/8" quick connect Flow range:1-30L/min Working voltage:DC3V-12V Accuracy:±0.5% Output singal:pulse singal,2.5mL/P Max operation pressure:0.8Mpa with fluid temperature of +20℃ Ambient operating temperature:-10 to 70℃(freezing must be avoided) Wiring:Red---Power+;Black---Power-;Blue---Pulse singal This product mainly used to measure oil, gasoline, diesel, milk,chemicals(weak acid and base), etc liquids. Packaging include Flowmeter x 1