BRAND NEW APPLE WATCH - SERIES 4 (Space Grey Aluminium Case and Black Band) Product Description With an updated thinner design, yet providing the largest Apple Watch display to date, along with containing an even faster processor than previous generations, the Apple Watch Series 4 is a great wrist-based communications, health and fitness companion. Workout detection Apple Watch can tell when you’ve started a work out – it’ll alert you to fire up the Workout app. Handily, the Watch will credit you for the exercise you’ve already, so there’s no hard done by feelings. Dive in The Apple Watch Series 4 is water resistant to 50 metres, so there’s no need to remove it when you’re swimming. Live a healthier life The Series 4 monitors your heart rate throughout the day, so you can quickly and easily keep track. If the watch detects any unusually high or low heart rates, it will alert you — even when you don’t feel symptoms. Tap and pay Just hold the Apple Watch Series 4 to the checkout reader to make payments via your credit or debit card. No matter how you use it, Apple Pay keeps your financial information completely private and secure. Great GPS The handy, built-in GPS measures your workout accurately, so whether you're going for a swim, run or a ride, you can leave your iPhone at home. Distance, speed and pace are all precisely recorded for you, ready for when you get back home to review your route on your iPhone. Additionally, your Apple Watch Series 4 comes with a barometric altimeter, so your new wrist-based coach can keep count of the amount of hills you’ve climbed and descended. What’s the difference between GPS and GPS + Cellular? GPS The Apple Watch Series 4 GPS lets you send and receive text messages, answer telephone calls and receive notifications when it’s connected to your iPhone via Bluetooth and Wi-Fi. The built-in GPS works independently of your iPhone for distance, pace and route mapping in workouts. GPS + Cellular The Apple Watch Series 4 GPS + Cellular has all the same great features as the above, as well as built-in cellular. It gives you the freedom to send and receive text messages, answer phone calls and even receive notifications when you don’t have your iPhone with you. Cellular Carrier Support Connecting your Apple Watch Series 4 GPS + Cellular to a cellular network requires the same carrier as your iPhone. Additional information: manufacturers often update their Operating System (OS) software over the course of a device’s lifespan – this means that your product might ship with a more advanced OS than specified.