Measurement accuracy: ±0.5% of full scale Width x depth x height: 57 x 42 x 202mm Wind speed calculation (sold separately requires pitot tube) Measurement range (m/s): 2 to 17.5 Resolution (m/s): 0.1 Measurement range (hPa): 0 to 200 Resolution (hPa): 0.1 Power供应(v):1 x层压9V干电池(随附)