Thank you for viewing. I've used this for a year. My bird prefers being on the ground now, so I no longer need this heater and am selling it. The box is large, so I won't include it. Please save the images here. The main unit (the switch is hard to see, so I've written "on/off" with a marker). The main unit and two metal fittings are the only items for sale. Attach it directly to the outside of the cage, but the heat from the heater comes out the back, so don't cover it. (I used a bookend and wrapped two perches with masking tape, creating a gap. (For reference) Please ask if you have any other questions. The condition has some discoloration from being used outside, but it works normally. I've confirmed that it heats up.