According to the manufacturers, the machine can help both police and private industry to investigate people's honesty. Firms can use it to test applicants for jobs; for instance, to check on drug use or political attitudes, and to see whether their staff are honest. Insurance investigators could use it to detect false claims, and to see whether clients will accept less money than they should get. There are three main objections: the machine only detects stress, which may not be due to dishonesty; it could be used for political control; and its accuracy depends on the skill of the operator.