SAFE & EFFECTIVE - The TENS Machine is safe for home use and fully compliant with the medical device directive Class 2a. The device is a true TENS machine and is recommended by most pain clinics across the UK. It has full medical approval and certifications CE 2460. IN THE BOX - This device includes instructions and a patient and placement guide. Inside the box, you’ll also find 1 TENS unit, 4 pack of self-adhesive 5x5cm electrodes, 1 x USB lead and charging adaptor, and 2 x patient leads. DUAL CHANNEL FUNCTIONALITY - The Dual-Channel TENS machine assists pain management at home, work or while travelling. Its dual-channel functionality allows you to surround pain with electrode pads and set your desired pulse rate and pulse width. 24 BUILT-IN PROGRAMMES - The Digital TENS and EMS Combo unit comes with 24 clinically approved programmes which includes 12 TENS and 12 muscle and neuromuscular programmes ideal for pain relief, muscle re-education, relaxation, and strengthening. CHRONIC PAIN RELIEF - The Med-Fit Professional Rechargeable Dual Channel Combined TENS & Muscle Stimulator uses mild, safe electrical signals to the nervous system to inhibit pain. These electrical pulses stimulate the release of endorphins, the body's natural pain reliever.