3M™ Attest™ Sterilization Biological Indicator Vial, 1 Box of 25 Grooming Aids US 1000 3rd Edition is Commode Shower Chair Accessori US 1000 3rd Edition is an FDA approved portable therapeutic ultrasound unit * New now with 3 power output settings * Device must be used with ultrasound gel to conduct the ultrasound energy to the skin * Comes complete with ultrasound AC adapter carrying case ultrasound gel and instruction manual * Generates deep heat through a piezoelectric crystal sound head * The piezoelectric crystal converts electrical energy into a strong vibratory sound wave or ultrasound * Sound waves cause vibration in soft tissue cells increasing temperature and inducing vasodilation * Power Source: AC Adaptor (DC 24V 200mA) * Output Frequency: 1 Individually foil wrapped bandages minimizing false positives and assuring more accurate results Biological indicator vials are easy to use and interpret with visual color readout in 24 hours