How big is the Black & Decker BCFK706 inside?

It holds 7.0 cu. ft., roughly a mid-sized chest freezer. That is enough for a quarter or half of a large animal plus frozen produce, or several weeks of family groceries.

Does it defrost itself?

No. It is a manual-defrost chest freezer, so ice builds up over time and needs periodic thawing and cleaning. Plan for that a couple of times a year in humid spaces.

Can it go in a garage or unheated room?

It is freestanding and designed for general household placement, but check the manual's ambient temperature range before putting it in an unheated garage or shed, since extreme cold or heat affects freezing performance.

What is fast freeze for?

Fast freeze drops the temperature quickly so newly added food freezes fast, which better preserves texture and nutrients. Use it when you load a large batch of fresh meat or produce.

Is there a child lock?

Yes, it has a child lock to keep the lid from being opened by children. That is useful if the freezer sits in a family space.

How much space does it need?

It measures 35.6 inches wide, 20.5 inches deep and 32.3 inches tall and weighs about 68 lb. Leave clearance around the sides and back for airflow, and check the lid's swing before placing it against a wall.