<P> The iPhone 6S is powered by the Apple A9 system - on - chip, which the company stated is up to 70% faster than Apple A8, and has up to 90% better graphics performance . The iPhone 6S has 2 GB of RAM, more than any previous iPhone, and also supports LTE Advanced . The Touch ID sensor on the 6S was also updated, with the new version having improved fingerprint scanning performance over the previous version . </P> <P> While the capacities of their batteries are slightly smaller, Apple rates iPhone 6S and 6S Plus as having the same average battery life as their respective predecessors . The A9 system - on - chip was dual - sourced from TSMC and Samsung . Although it was speculated that the Samsung version had worse battery performance than the TSMC version, multiple independent tests have shown there is no appreciable difference between the two chips . Although the device is not promoted as such, the iPhone 6S has a degree of water resistance because of a change to its internal design, which places a silicone seal around components of the logic board to prevent them from being shorted by accidental exposure to water . </P> <P> Their displays are the same sizes as those of the iPhone 6, coming in 4.7 - inch 750p and 5.5 - inch 1080p (Plus) sizes . The iPhone 6S features a technology known as 3D Touch; sensors are embedded in the screen's backlight layer that measure the firmness of the user's touch input by the distance between it and the cover glass, allowing the device to distinguish between normal and more forceful presses . 3D Touch is combined with a Taptic Engine vibrator to provide associated haptic feedback . Although similar, this is distinct from the Force Touch technology used on the Apple Watch and Retina MacBook, as it is more sensitive and can recognize more levels of touch pressure than Force Touch . Due to the hardware needed to implement 3D Touch, the iPhone 6S is heavier than its predecessor . </P> <P> The iPhone 6S features a 12 - megapixel rear - facing camera, an upgrade from the 8 - megapixel unit on previous models, as well as a 5 - megapixel front - facing camera . It can record 4K video, as well as 1080p video at 60 and now 120 frames per second . The camera was well received by many critics of the phone . When the camera takes a 4K video recording it can use the storage on the phone rapidly . The 16 gigabyte version of the phone was only able to hold 40 min of video . </P>

What is the length of an iphone 6 s
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