Any one over 5w will do, and it can be used with the mobile phone charging head.

if there are many digital devices, you can actually buy a multi-port charging head, and all devices can take care of it.

Apple Watch is a smart watch released by apple on September 1th, 214, including Apple Watch and Apple Watch Sport? And Apple Watch Edition? Three series with different styles.

on March 1th, 215, Apple released the Apple Watch (1st generation), which uses artificial sapphire crystal screen and Force Touch touch technology, and has a variety of colors to choose from. On September 1, 215, Apple introduced several new versions of Apple Watch, including new color matching, Hermes leather watch band, and multi-color watch bands.

On September 13th, 217, Apple held the 1th anniversary conference of iPhone1 and released the Apple Watch Series 3. On September 13, 218, Apple Watch Series 4 and other products were released at the 218 Apple Autumn New Product Launch Conference.

At the p>219 Apple Autumn Product Launch Conference, Apple launched three new iPhone and the Apple Watch Series 5. On September 16th, 22, Apple Watch Series 6 and Apple Watch SE were released at the 22 Apple Autumn New Product Launch Conference.

on June 25th, 221, after the service is enabled, you can do electrocardiogram on Apple Watch.

on September 15th, 221, at the 221 Apple Autumn New Product Launch Conference, Apple Watch Series 7 was released.

Apple Watch has a variety of personalized dials, so you can change and customize the settings at will. On the customized dial, you can add practical information such as weather and next activity. Can display the user's heartbeat information. Apple Watch and iPhone? When used together, the error with the global standard time is less than 5 milliseconds.

when receiving the notification, Taptic Engine will immediately remind you through Tap.

Apple Watch can send Sketch, taps and heartbeats to other Apple Watch users through Digital Touch.

every Monday, Apple Watch will suggest new sports goals for users based on the activity data of the previous week.

watchkit: the watchkit SDK allows developers to tailor a new variety of App experiences for the Apple Watch.

the watch has built-in UBER. And the watch can unlock the room door directly, and the Passbook can be used as a boarding pass to watch videos, images and so on remotely.

China applications: WeChat, Weibo, Alipay, Meipai, Ctrip, etc. Alipay wallet in Apple Watch provides functions such as balance treasure, payment code, exchange rate, conversion, public transportation and one-click collection of "ANT FOREST Energy". Other applications will be simplified accordingly, and only the functions that are more suitable for wearable devices will be reserved.

the Apps available for Apple Watch can be downloaded from the App Store. Apple Watch's battery life is all-weather, and it can be used for 18 hours. Apple does not describe the battery too much, but has some reservations. It should be a brand-new technology.

WatchOS 2. has added functions such as map navigation and timeline, and the number of third-party apps adapted to Watch has reached 1,. Apple Watch can use Facebook Messenger to control Go Pro, etc. WatchOS 2 is more friendly to medical apps, allowing developers to develop applications that can monitor blood pressure and heart rate in real time.

Apple Watch has also launched a new leather strap, which will be sold in specific Apple direct stores. The specific information has not been disclosed yet. Apple Watch Sports Edition will also introduce more color dials and straps to improve its customization. The new Apple Watch Sports Edition will be on sale from now on, and the price will remain unchanged.

On June 19th, 218, the University of Alabama announced that it would try to replace the physical student ID card with Apple Watch. From this week, students wearing Apple Watch can use their watches to enter the dormitory, buy meals in the canteen and use library services.

On August 6th, 218, in order to celebrate the National Fitness Day on August 8th, Apple encouraged Apple Watch users in China to take an active part in a new fitness record challenge. Users can get exclusive medals and information stickers by successfully completing 3 minutes or more physical training on August 8.

According to the news released by China Intellectual Property News on April 1, 219, recently, the US Patent and Trademark Office published a patent application of Apple called "Biometrics on the Back of Wrist for Wearable Electronic Devices with Light Field Camera", which detailed the biometric unlocking technology of Apple Watch.

At the WWDC Global Developers Conference in 22, Apple announced that Apple Watch would launch a sleep tracking function to create personalized sleep habits by minimizing interference. For example, when it is close to bedtime, the screen will gradually dim, and at the same time, sleep-aid music will be played. After you get up, you will get a simple greeting and sleep score.

Not only that, Apple Watch can also detect hand washing. When the user washes his hands, the watch will count down, thus achieving the washing effect.

On June 25th, 221, according to Apple's official introduction, ECG function is a test to record the time and intensity of electrical signals that make up the heart beat. By reading the electrocardiogram, doctors can deeply understand the user's heart rhythm and check for signs of irregularities. This function requires the use of ECG App and recording through Apple Watch.