The Babycare Elle TENS Digital can be used at the onset of labour. Apply the 4 pads to your back as shown in the accompanying instructions and switch the Elle TENS unit on. You will feel a pleasant pulsing sensation; this will help to increase your own pain relieving chemicals known as endorphins. When experiencing a contraction, simply press the boost button for the extra surge of power needed to temporarily relieve the pain. When the contraction ends, press the boost button again and restart the cycle.The Elle TENS is the only obstetric TENS, which offers Opti-max technology. Opti-max technology gives an extra reserve of power for when you really need it. It is most commonly used for the final stages of labour when you are ready to deliver and need extra pulse power. It can also be used at any time depending on your preference and can be used to temporarily relieve post natal pain. The Babycare Elle TENS Digital can be used to temporarily relieve minor backache, shoulder pain, and other minor aches and pains.