The present invention improves measurement of the formation induction response in the presence of the primary magnetic field generated by a logging tool’s transmitter. The system may include a session manager logically connected between a server and the client device. The circuit board is disposed within the casing. The complex button assembly is installed to face upwardly on the upper surface of the case or rearwardly and upwardly on the upper surface of the case such that a user can easily operate the portable multimedia device. The output data may then be received and decoded for display.