The Beurer EM 49 Digital TENS and EMS device is fantastic to use for pain relief without the need for medication. It delivers natural pain-killing telectrical nerve stimulation (TENS) direct to the site of pain and EMS massage. Medically certified, the Beurer EM 49 uses 4 self-adhesive electrodes to deliver one if its 64 pre-set programmes. In addition to the pre-set programmes, there are 6 customisable programmes which you can set yourself with the help of your physiotherapist or health professional. The large backlit LCD display shows you where to place the electrodes for maximum effect, the intensity setting and treatment time remaining.