NeuroTrac Multi TENS. NeuroTrac introduce the MultiTENS which boasts the ability to run two programmes at once, allowing you to control your pain more effectively. Pain can be managed in two ways; via the ‘pain gate mechanism’ whereby pain signals are prevented from reaching the brain; and the release of endorphins – the body’s natural pain killing hormone. The NeuroTrac MultiTENS delivers both of these methods at once. And buy this NeuroTrac Multi TENS Now £58.99.