Ready to use from the day it arrives! This is a heater for small animals, birds, and reptiles. It's a light bulb type stove, keeping them comfortably warm even in the cold season. ◎ A light bulb heater that radiates infrared rays to warm your pet's body. ◎ Protected by a steel cover to prevent mischief from your pet. This is a used item, used for about two weeks. I am also selling two "Yorisoi Heaters" and other bird beds and swings. If you are considering purchasing two or three items, please comment. I will offer a small discount. #budgerigar #cockatiel #java sparrow #chick #bird #cold protection #cold weather measures #heat retention