HP-856A USB Portable Handheld LCD Display Digital Anemometer Wind Speed Meter Tester Condition: Item Type: Anemometer Material: ABS Color: As shown in the picture Weight: Approx.933g/32.9oz Function Unit Wind speed Resolution Lowest Point of start value  Accuracy Wind Speed Range m/s 0.0-45.0 0.001 0.3 ±3%+0.1rdg Ft/min 0.0-8800 0.01/0.1/1 60 ±3%+20rdg Knots 0.0-88.0 0.001/0.01 0.6 ±3%+0.2rdg Km/h 0.0-140.0 0.001 1 ±3%+0.4rdg Mph 0.0-100 0.001/0.01 0.7 ±3%+0.2rdg Wind Flow Range CMM: 0-999900m3/min,CFM: 0-999900 ft3/min Unit Range   Resolution Area  CMM(M3/MIN) 0-999900 0.001-100 0.001-9999 CFM(FT3/MIN) 0-999900 0.001-100 0.001-9999 Unit Conversation m/s Ft/min Knots Km/h Mph m/s 1 196.87 1.944 3.6 2.24 Ft/min 0.00508 1 0.00987 0.01829 0.01138 Knots 0.5144 101.27 1 1.8519 1.1523 Km/h 0.2778 54.69 0.54 1 0.6222 Mph 0.4464 87.89 0.8679 1.6071 1 Air Temperature Range  Unit Scale Resolution Accuracy ℃ 0.0-45.0 0.1 ±1.0℃ ℉ 32.0-113.0 0.1 ±1.8℉ Operation Conditions Temperature Humidity Host 0-50℃(32-122℉) ≤80%RH Wind speed sensor 0-60℃(32-140℉) Storage Conditions  Temperature -10-60℃(14-140℉) Humidity  ≤80%RH Battery  6F22 9Vx 1(Not included)