Manufactured by Respironics, this 12-volt DC power cord is designed to allow you to connect your Puritan Bennett Sandman series CPAP or Goodknight 425 Bi-level machine to a 12-volt cigarette lighter power source in your automobile. Great for those who travel by vehicle often such as campers or long distance truck drivers. Please note: When in use with the Sandman series machines, please use the included 7 amp fuse.