Imprinted - Stethoscope clip digital timer with BMI functions. This unit features Body Mass Index (BMI) calculator and pre-programmed 15, 30 and 60 second pulse timers. This unit also has a standard digital clock with alarm and date. Fits nicely on the tube of most stethoscopes and is a great item for nurses and doctors. Clip attaches to all standard stethoscopes. Features a control wheel. Patented: 7,236,994 & D569,745.