This thermometer with suction cups can be affixed to any window, in or outside of your home. The dual temperature reading (°C or °F) scale ranges from -30°C to 50°C (-20°F to 120°F).The BIOS Weather product line is the most extensive “Weather Program” on the market. It ranges from the most technically sophisticated consumer devices to reproductions of some of the most historical weather instruments ever designed. The BIOS Weather brand offers a comprehensive line of state of the art weather thermometers and instruments, both analog and digital. The BIOS brand is synonymous with accuracy, reliability, and innovation.