Perfect for your living room, den, workshop or office. Instruments are accurate, low-cost and practical. The Series Mark II Wind Speed Indicator indicates wind speed directly on liquid-filled scale reading in both Miles per Hour (0-80) and Beaufort scale (1-12). Also available is the metric model, same as above but reading 0-130 kilometers per hour. To order, specify Mk II Wind Speed Indicator, MPH or Mk II Wind Speed Indicator, KPH.