What is the operating temperature range for the device?

• A. -4 degrees F to 104 degrees F
• B. -22 degrees F to 140 degrees F
• C. 0 degrees F to 100 degrees F
• D. -40 degrees F to 120 degrees F

Answer: (A)

Understanding operating temperature range is about knowing the ambient temperatures within which the device is guaranteed to work reliably. For this device, the official operating window is -4 to 104 degrees Fahrenheit, which is roughly -20 to 40 degrees Celsius. Staying within this range protects the hardware from thermal stress and ensures proper performance.

The other ranges either claim temperatures outside that guaranteed window or are narrower than what the device is rated for. For example, -40 to 120 F goes beyond both ends of the specified range, and the device isn’t guaranteed to perform there. -22 to 140 F also stretches beyond the limits. And 0 to 100 F is narrower than what’s specified, excluding temperatures the device is actually designed to handle. So the -4 to 104 degrees Fahrenheit range best matches the device’s stated operating conditions.