I was living in South Florida, at the time and had a big outdoor cage for my two green amazon parrots, on loan from a friend who was reorganizing his cages and remodeling his house. Anyways, winter weather in Florida, can be very cold for tropical birds. These two could scream like bangee's and thus I could not bring them in my little house.
Their cage had several perches and they were very active birds. I had their cage located next to a shed so they could go in and out with whenever, they chose too.
The heated perch is called a "Thermo Perch," it is thermostatically controlled. It radiates warmth at an optimum temperature range of 102-107 degrees F. It can be left on continuously. the parrots loved sitting on it and never had any problems with it's performance.
