Apple's iPhone 6s is a product of Apple Inc. A smartphone released in September 2015. It is an upgraded version of the iPhone 6 series and offers many improvements and upgrades. Here are some of the main specifications and features of Apple's iPhone 6s:

1. Design: The design of the iPhone 6s is similar to the iPhone 6, but uses a more powerful aviation-grade aluminum metal shell for better durability and scratch resistance. It has the same 4.7-inch screen with a resolution of 1334 x 750 pixels and uses IPS LCD technology.

2. Processor: The iPhone 6s is equipped with Apple's A9 processor, which improves performance by approximately 70% compared to the previous generation A8 processor. In addition, it is equipped with an M9 sports coprocessor to process data from various sensors, improving overall performance and battery life.

3. Camera: The iPhone 6s comes with a 12-megapixel rear camera that supports 4K video recording and Live Photos. The front-facing camera is 5 megapixels and supports FaceTime high-definition video calls.

4. Memory and storage: The iPhone 6s comes with 2GB of memory and offers storage options of 16GB, 32GB, 64GB and 128GB. However, it should be noted that the 32GB, 64GB and 128GB versions have been discontinued, and the 16GB version is mainly circulated on the market.

5. Touch ID: The iPhone 6s is equipped with a second-generation Touch ID fingerprint recognition sensor, which has faster recognition speed and higher accuracy. In addition, it also supports Apple Pay mobile payment features.

6. Operating System: The iPhone 6s originally came with the iOS 9 operating system, but can be upgraded to the latest iOS 15 version to get more features and security updates.

7. Battery: The iPhone 6s has a battery capacity of 1715mAh and can theoretically provide up to 14 hours of talk time, 10 days of standby time and 10 hours of web browsing time. However, actual battery life performance may vary, depending on usage habits and settings.

It should be noted that Apple has stopped providing hardware support for the iPhone 6s, which means it will no longer receive any major software and feature updates. Although it can still run the latest iOS version, it may lag behind the latest iPhone in some features and performance. Still, the iPhone 6s still has some appeal for users who prefer small phones and don't need the latest features.