Product Note that this is a separate, it does not include the actual hummingbird feeder Now, it's easy to get nectar flowing in your hummingbird feeder this winter. If you feed hummingbirds, you know how scary it can be to wake up in the morning and see a frozen hummingbird feeder. You missed watching these incredible creatures. More importantly, what are those little guys going to eat? Just connect to your existing hummingbird feeder (note that hummingbird feeders are not included) and turn it on before the temperature drops below freezing. Effective. The firewall easily connects to a variety of hummingbird feeders with ring bass. Incandescent bulbs heat the bottom of the feeder, gently heating the nectar to a certain temperature and preventing freezing. Features: Material: ABS. Red Product size: 14*21*21CM/5.51*8.27*8.27inch Included Items: 1* Bird Feeder Heater Set (bird feeder not included)