The removable Rapid RH Easy Reader with our patented Touch-n-Sense™ technology allows you to take repeated readings from any Smart Sensor quickly and easily. The patented Touch-n-Sense technology means readings are taken as soon as the Easy Reader contacts the Smart Sensor. The LCD display on the Rapid RH® Easy Reader toggles between RH (%) and temperature (F or C), and the automatic “hold” feature continues to display the reading for a period of five minutes after removal from the test hole before turning itself off, or until inserted in a new Smart Sensor.