Instructions for operation: 1. Set startup temperature/humidity:Press the "up" button once to display the starting temperature(humidity). Long press the "up" button for about 3 seconds,The required temperature(humidity) can be set by the up and down 2. Set the stop temperature/humidity:Press the "down"button once to display the stop temperature(humidity). Long press the button for about 3 seconds and the stop temperature(humidity) number flashes. The required temperature(humidity) can be set by the up and down 3. Temperature/hunidity correction:Press "up" and "down" button at the same time. Colour:Photo Color Material:plastic Package Contents: 1 x thermostat Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.