Aspects of the present invention provide apparatuses and methods for conducting pupil height measurements. A portion of the contacting device may be bonded to the printed circuit board, and includes leads which extend along in outer surface thereof, from an outside edge of the package to a downward facing surface of the package which faces an integrated circuit die. The RFID reader can intermittently transmit the radio waves such that when a response from the RFID tag is not received by the RFID reader the RFID reader provides an alert. The secondary firearm is rotated by a swivel control built into the primary firearm. The electrode has a blunt tip to help prevent piercing of the wall of the urethra during insertion of the electrode into the urethra through the penis and the positioning of the electrode tip near to the point of urethral obstruction.