This reproduction of the arm of an 5-year-old attaches to the right shoulder opening of anyÂ Life/formÂ®Â Child Airway Management/CPR Torso. The arm is hinged to swing away from the body for easy accessibility. The arm is programmed to demonstrate the five Korotkoff phases, and an auscultatory gap switch may be used to simulate the auscultatory gap that is sometimes present between Phase I and Phase II sounds. Select systolic and diastolic settings, adjust volume and pulse rate, and easily calibrate when needed. Has palpable radial pulse. The optional external Amplifier/Speaker System (LF01189U">LF01189U) can be used instead of the speaker in the arm to broadcast sounds for a group. Includes sphygmomanometer, cuff, and gauge assembly. Requires six "AA" batteries (included). Five-year warranty.