Kestrel 5100 Racing Weather Meter with LinkRugged, USA-made handheld weather meter measures trackside conditions for optimum performanceLarge graphic display is easy to read in bright sun and backlit for use in the darkOnboard time-stamped data tracking and logging; transfer wirelessly via LiNK to your mobile deviceOver 15 measurements including moisture content, air density, RAD, humidity, temperature, and windUsed by professional racing teams, bracket racers, drag racers, and pit