Janet Airlines' baggage information is not public information due to the nature of the airline.

Janet Airline operates flights with very few personnel, on narrow-body aircraft such as Boeing 737-600's and Boeing 737-200's. Due to the size of the aircraft, there's only 1 cabin class onboard a Janet Airline flight - the cabin class is not named. 

Janet Airlines predominantly fly out of Harry Reid International Airport in Las Vegas, Nevada. The airline has its own dedicated terminal and parking area to keep private matters highly secretive and avoid members of the public from overhearing information that is prohibited to them. 

Check-in may either be completed online prior to their flight or alternatively, once they've arrived at the airport.

Due to the nature of Janet Airlines, and the lack of information surrounding the high-security airline, it's unknown whether any in-flight entertainment is onboard its flights. There is likely some form of entertainment onboard for passengers to keep busy during their journey such as an in-flight magazine or back-of-the-seat tv screens. 

It's unknown whether any food or drink is available to be purchased onboard a Janet Airlines flight. Limited options may be available to them depending on the size of the aircraft used to carry personnel.