BioMedical Life Systems Inc. INF Plus Interferential Device utilizes Microprocessor technology, with tolerance levels of less than 10%, this portable device incorporates a sinusoidal wave form usually found only in large Clinical Models. Three pre-programmed sweeps; 1-10Hz, used for Edema Reduction, 80 – 150 Hz used for Pain Relief, and 1 – 150 Hz used for Total Treatment allow for easy set up and patient instruction. The Device offers Bipolar stimulation using two electrodes where the interferential stimulation is already “mixed” or Full interferential stimulation with the use of four electrodes. The device has a timer for the desired treatment time, and operates on four AA batteries or an optional wall adaptor optional . Includes Lead wires 4 Electrodes Battery Instruction booklet Carrying case Specifications Size 2.75 x 4.5 x 1.5 Weight 8.1oz Channels Dual Waveform Symmetrical sinusoidal biphasic INF Carrier Frequency 4000 Hz, Fixed Interference Frequency adj 4001 4150 Hz Continuous Stimulation adj. Difference Frequency 1-150 Hz Frequency Shifts 3 1. 1 10 Hz over 6 seconds 2. 80 150 Hz over 8 seconds 3. 1 150 Hz over 10 seconds Output Current 0 66 Milliamps peak to peak Output Voltage 0 2.5 Volts peak to peak Intensity adj. 0-66 mA Power Supply 4 AA Batteries Optional Medical Grade wall adaptor 1 Each / Each