The Walker 2050 uses a Combined Anemometer Cup & Vane Direction Sensor, the P296. This gives high accuracy in a robust compact package! The Sensor connects directly to a standard Walker DIN 144 wind speed & direction indicator, the P1249, which gives digital displays of relative wind speed & direction. Wind direction is also displayed on a simulated analogue display by use of OLED technology. True wind systems are available by using this sensor with the Walker P1066 True Wind Interface Unit.