These hygrometers are used for monitoring your inside and outside growing environments with the Digital Series Indoor/Outdoor Min Max Thermometer.
It has a large display with in (unit) and out (sensor) temperature alternating, constant humidity with min/max memory.
Temperature Range: -50°C – 70°C(-58°F – +158°F)
Humidity Range: 10% Rh – 99%Rh
Humidity Accuracy: ±5%,
Size: 11cm x 10cm x 2cm