Dual channel digital TENS device allows more precision in stimulating nerves to treat pain. Compact design has flip top LED display screen that is easy to read. Push button controls and simple instructions guide the user through pre programmed or programmable functions. 4 modes of operation continuous width modulation 50% decreaseincrease of set width over 5 seconds burst 8 pulses per burst 2 bursts per second and cycled burst 0.5 seconds on 0.5 seconds off. The pulse rate adjusts from 1om 1 150HZ and the pulse width adjusts from 10 250us. Patient timer 0 15 30 60 minutes for desired treatment periods. Output intensity adjustable from 0 98 mA. Kit includes four pigtail electrodes two pairs of leadwires four AA batteries car carrying case and instructions. 3.25L x 2.25W x 1 58H. 8 oz. Limited 5 year warranty.