Can you have two displays use one sensor? example, I want to get another unit for a different room, but don't want to mount multiple sensors.

Hello, Absolutely! Multiple display units can read data from a single sensor as long as they are all set to the same ABC channel. For further assistance, please reach out to our support team via live chat or email request on the AcuRite Support website. Have a great day! Haylee AcuRite Support Team