What is Black box in helicopter?

What is Black Box in helicopter? 

A Black Box is a vital electronic device also known as Flight Data Recorder that records 88 vital parameters about a flight including, airspeed, altitude, cockpit conversations, and air pressure among others.

A Black Box is neither black in colour, nor box in shape, but is actually a compressor shaped device made in high-visibility orange colour. Experts disagree how the nickname originated, but many historians attribute their invention to Australian scientist David Warren in the 1950s. A Black Box is mandatory for all commercial airliner and armed forces to preserve clues from cockpit sounds and data to help prevent future accidents.