Is the transmitter waterproof?
The transmitter is not waterproof, please do not place it in the open air. It can be placed on the outdoor eaves or in a sheltered place on the transmitter. Do not let the transmitter come into direct contact with rainwater.
Why theres a difference between Indoor and Outdoor Temperatures?
Allow up to one hour for the sensors to stabilize due to signal filtering. The indoor and outdoor temperature sensors should agree within 2 °C(the sensor accuracy is ± 1 °C).
The transmitter signal is not received on the main unit all the time?
Please reconnect, it is better to reload the batteries of the main unit first, then put the signal of each transmitter in turn.