Product Description:

Indoor / outdoor temperature, indoor humidity display. °C / °F temperature switch display, comfort display. Indoor and outdoor maximum and minimum temperature memory function. Memorized MAX/MIN indoor temperature and humidity value automatically. With a back stand , convenient to place. Built-in sensor to simultaneously measure the temperature.

Video Instruction:

https://www.youtube.com/watch?v=kuZOA6lNfiw Here's a video instruction of setting up the HTC-1 clock which should help you.

Specifications: