Features1. Measurement of wind velocity, temperature and flow 2. Unit conversion of wind velocity,temperature and flow 3. Measurement of MAX and MIN wind velocity 4. Measurement of 2/3V max and average wind flow 5. Data holding,storing and deleting function 6. Low battery indicating function 7. Auto power off function (power off autocratically if no further operation for 10 minutes) 8. Large LCD display, backlight 9. Retractable drag rodSpecification1. Measuring Range: - Air Velocity: 0-45m/s, 0-140km/hr, 0-8800Ft/min, 0-88 knots, 0-100mph(accuracy +/-3%) - Air Temperature: 0 degree C~+45 degree C, 32 degree F-113 degree F(Accuracy+/-2 degree C) 2. Resolution: 1 degree C, 0.1m/s 3. Units of velocity: m/s.ft/min, knots, km/hr, mph 4. Power supply: 4 x 1.5V AAA battery (not included)Specification: Package Weight One Package Weight 1.39kgs / 3.06lb One Package Size 32cm * 25cm * 9cm / 12.6inch * 9.84inch * 3.54inch Qty per Carton 10 Carton Weight 13.80kgs / 30.42lb Carton Size 47cm * 50cm * 33cm / 18.5inch * 19.69inch * 12.99inch Loading Container 20GP: 343 cartons * 10 pcs = 3430 pcs 40HQ: 798 cartons * 10 pcs = 7980 pcs