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Thank you for your question, Bobby. The operating temperature for the unit is 14°F to 122°F (-10°C to 50°C). If temperatures drop to -20°F, that is below the recommended operating range. In those conditions, the doorbell may temporarily stop working or experience reduced performance (such as battery drain or delayed response). However, brief exposure to temperatures below the range does not typically cause permanent damage. Once temperatures rise back within the supported range, normal operation usually resumes. For very cold climates, installing the unit in a slightly sheltered area can help improve performance during extreme winter weather. Mary - Swann Team.
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