The Birth-Assist Obstetric TENS is specifically designed to bring the drug-free benefits of TENS to pain management. The Birth-Assist is a dual channel units which incorporate durability with very simple operation. The output can be adjusted to each pair of electrodes in response to the patient's degree of site pain. The hand held boost control allows for extra pain relief when switched from normal to burst to continuous mode with a gradual 3 10% lift in powers.