Measurement items: Air velocity, Air temperature * Temperature measure range: -10~45C (accuracy: ±2C) * Air velocity measure range: 0~30m/s (accuracy: ±5%) * Air velocity unit: m/s, ft/min, Knots, Km/h, mph * Resolution: 0.1m/s 0.2C , power supply:3V CR2032 battery(Not included)