The SwiftPaws Drive should not be left out when not in use. It might be considered water resistant but it's not water proof. That means that if it starts to rain, grab it and bring it inside!
It is designed for outdoor use, but we recommend packing up at least the drive and remote and storing them out of the weather after each use.
The pulleys and string can be left setup, the drive itself (the part that the battery goes in) and the remote control handle should always be brought inside. These parts have electronic components that can be damaged if they get wet.