A simple hand gesture can go a long way. Apple Watch Series 9's Double Tap feature lets you play music, answer calls, reply to a message and tons more. Just tap your thumb and index finger twice. Magic! The Always-On Retina display is brighter and more beautiful than ever so you'll have no problem seeing it when the sun's out. The brain behind it all is the new Silicone S9 SiP, which keeps everything running smoothly and lightning fast. Lost your iPhone? Panic not! Precision Finding will help you track it down with accurate directions and distance. And Siri has been given a facelift too - all you have to do is raise your wrist. Your requests are processed on the device so they're more secure, more accurate, and more importantly, faster.Good to know- WatchOS 10 breathes new life into your favourite apps and squeezes more information on the screen- With 18 hours of battery life, it's ready for all-day wear - stick it in low-power mode and it jumps to 36 hours- With Crash and Fall Detection, your Watch can alert emergency services and your emergency contacts if you're involved in an accident- The Sleep app tracks how much time you spend in REM, core or deep sleep so you can wake up refreshed- Measure your blood oxygen or take an ECG right from your watch and keep close tabs on your health- However you like to stay active, you'll find the perfect workout for you in the Fitness+ app (subscription required)- It's super tough so it'll hold up against bumps and dings - it's also water resistant to 50 metres- It's got all the features you know and love from previous generations, like Maps and Apple Pay