Flow range: 0.03 to ±40ft/s (0.01 to ±12m/s)Accuracy: ±1.0% of reading (0.5 to ±5m/s)Repeatability: 0.3%Power supply: internal lithium battery with 12 hours of useOutput: 0/4~20mA,Website:http://www.pflowmeter.com, maximum 750ΩPower consumption: 1WWeight: 3.3lbs (1.5kg)