Marukan External Insulation Board 20W For Small Animals and Birds ◎ This heater gently warms your pet's body by radiating infrared rays. ◎ It doesn't emit light, so it won't disrupt your pet's natural sleep cycle. ◎ A protective coil is installed to prevent pets from accidentally chewing on the cord. Purchase Date: November 2025 Usage Period: Used for about a week on a budgie cage. Please refrain from purchasing if you are sensitive to used items, as the usage period was short. Also, feel free to comment if you have any questions or would like additional images. Shipping will be closed from January 1st to 4th.