A small control unit and a pair of sticky pads. Put the pads where it aches, choose a mode, and let it work while you carry on with something else. Useful after a long day at a desk, or on calves and shoulders after training. The pads are reusable, so you are not buying refills every week. HOW TO USE IT Clean, dry skin. Place the pads either side of the sore spot, not directly on the spine. Start on the lowest setting. Twenty minutes is plenty. IN THE BOX Control unit, pads and charging cable. DELIVERY Typically with you within 9 days. 14 days to change your mind.