xmetrics.it £219.99 Now that you’re convinced of the benefits of swim toys, lets step it up a notch. The Xmetrics PRO is a device that straps to the back of your head and records every swim-metric you can imagine. Benefits: As well as recording your swim data, it gives you live audio feedback through headphones of your swim splits, distance, duration and rest-periods. The unit also detects your stroke type, stroke rate and even the speed of your turns. After you’ve finished swimming your data syncs wirelessly to your smart-phone, tablet or PC. Tip: To help motivate you to swim hard, use the lap-times and lap-count audio feedback option.