This is a Yorisoi Heater (Companion Heater). For not only parakeets, but also hamsters, sugar gliders, and degus. I used it attached to the outside of the cage near the sugar glider's pouch. The pictures are everything. It kept them warm. I am also selling a version without a perch, so please take a look. Yorisoi Heater L? There is also a larger size. The presence or absence of parts is the same as this one. Yorisoi Heater L? The size is 3499 yen. Please leave a comment. Please read the profile before purchasing.