Features:
•  Electrodes: 2" round, 4/pkg
•  Dimensions: 1" x 2.5" x 3.75"
•  Weight: 4.1 oz (includes battery)
•  Power Source: 9V battery or AC adapter (both included)
•  Carrier Frequency: (4000 +/- 10%) Hz (adjustable)
•  Difference Frequency: (1 +/- 0.5) - (150 +/- 10%) Hz (adjustable)
•  Output Voltage: (16 +/- 2.5) Volts (500 ohm load)
•  Wave Form: Symmetric biphasic square
•  Pulse Width: (125 +/- 10%) us for each phase
•  Four Frequency Shift: Continuous, 1/1 abrupt, 8/8 abrupt, 10/10 ramped options

   Includes:
•  One pack of 4 electrodes
•  9V battery
•  AC adapter
•  Instruction manual
•  2 Lead wires
•  Carrying case  

*This item must be ordered by a licensed healthcare professional.