Simultaneous display of air flow or air velocity plus Ambient temperatureEasy to set area dimensions are stored in the meter's internal memory for the next power onresolution of 0.01m/second20 points average for air flowData hold and maximum/minimum holdCircuit: custom LSI microprocessor circuitMeasurement units: air velocity and air flowSupper large (9999 count) LCD backlit display3% velocity accuracy via low friction 2.83-inch D(72mm) ball bearing vane wheel on 3.9 feet(120cm) cableAir velocity sensor: conventional angled vane arms with low-friction ball bearingTemperature sensor: NTC-type thermo-resistantMaximum/minimum memory: record and view maximum and minimum readingsAutomatic power off: auto shut-off after 20 minutes to save batteryPower supply: 9V battery

Battery life: 100 hours (approximately)Power current: (approximately) 2.5mA DCAccessories: user manual, 9V battery, NTC temperature probe, vane sensor with 3.9-foot (120cm) cable, gift box with carrying case