To use the phrase from a certain TV advert -

"It does exactly what it says on the tin"

This radio is designed to receive all AM Airband VHF transmissions within range (see below). Whilst normal scanners frequently miss signals whilst scanning, the Black-Box misses nothing. So even if you have no idea of your local air traffic’s frequencies, the Black Box will bring them in, loud and clear. Great for air shows or when traveling around.

Used in a listening environment it's designed for,  i.e. at an airport, airshow or even on board an aircraft, the BlackBox certainly does allow you to "hear all", receiving transmissions missed by scanners whilst locked on to an active channel. However good this may sound, you need to be aware that "hear all" means just that, not just Air Traffic comms, but also ATIS broadcasts may be heard continuously or the screeching tone of an ACARS data burst etc.

The Black-Box instantly receives any transmitted Airband signal; it can even manage several at a time! No tuning is necessary. The supplied earpiece acts as an antenna, and a switchable built-in speaker is also featured. Background noise is kept under control by the inclusion of a squelch control. And whilst other Airband radios cannot be used inside an aircraft cabin, this model has no internal oscillators that can radiate, so it can be classified in the same category as an MP3 player.