There's a heart rate monitor embedded in the back of the phone. It can take your pulse when you rest your finger on it.
The back cover comes off so you can replace the battery.
There's also a slot for a microSD card in case you want to add more storage.
See that little dot on the right? That's an infrared blaster. The Galaxy Note 4 doubles as a universal remote control for your TV.
You can run two apps at once on the same screen. (But it only works with a handful of apps.)
You can also run certain apps in windows that can be resized on the home screen. It's sort of like having a mini desktop computer.
It comes with a stylus for drawing or taking notes on the screen.
The stylus is also really good at selecting text. It's much better than using your finger like you have to on the iPhone.
It comes a special wall plug that charges up the phone very quickly. You can also charge with a normal USB connection, but it won't be as fast.
Ultra power saving mode will help you squeeze several extra hours out of your battery. It makes the screen black and white and only lets you do a few limited things like make phone calls, browse the web, and open select apps.
See those icons on the right side of the screen? That's a special dock with standard controls like home and back buttons. It slides out from the side of the screen, which makes it easy to use the Note 4 with one hand.
You can also shrink the screen and use everything with one hand.
The keyboard can shrink for one-handed typing. (Some third-party iPhone keyboards allow this, but it comes built into the Note 4.)
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