Features *Brand new product with novel and modern appearance *2 output channels *New circuitry, no cross over, no interference *Continuous, intermit, and dense-disperse (modulated) waveforms *Adjustable frequency: 1-100Hz *Durable alligator clip wires *Timer: 0-60 minutes *Output safety alert-all outputs must be turned off before powering on the unit. Technical specs: *Output pulse amplitude: 0-50V (on 500 ohm load). Adjustable *Pulse frequency continuous wave - 1-100 Hz Adjustable, Intermittent wave: continuous wave frequency adjustable in 1-100Hz. Break-wave time is 5 seconds, continuous wave time is 15 seconds, Dense-clieperse wave spacing wave frequency is of density frequency, Density wave frequency adjustable in 5 - 100Hz. *Pulse width: 1ms *Pulse wave un-smmetry two-direction pulse wave *Wave form: adjustable, dense-disperse, and intermittent *Power source: DC 9V, or A/C adapter *Accessories: 2 connecting pin lead wires, 2 pairs alligator clips to connect to the pin lead wires, 2 pairs self-adhesive electrodes to connect to to the pin lead wire, 1 instruction manual. NOTE:Federal Law restricts the sale of TENS, EMS and Micro-Current devices to or on the order of a licensed physician.