The US 1000 offers effective ultrasound therapy by generating deep ultrasonic waves within body tissues to treat pain, muscle spasms and joint stiffness. The portable unit comes as a complete kit with carrying case, AC adaptor, ultrasound gel and manual. Power Source: AC adaptor. Output Frequency: 1.0 MHz Plus or minus 10%. Temporal Maximum Power: 4 W Plus or minus 20%. Output Intensity: Low 1.6 W, Medium 2.6 W, High 4.6 W. Duty Cycle: Low 8%, Medium 14%, High 29%. Output Mode: Pulse. Pulse Width: 8% 05 ms Plus or minus 10%. Repetition Rate: 150 Hz Plus or minus 10%. Timer Settings: 30 minutes with auto of.