The Gear 2 uses a similar user interface to the Galaxy Gear, allowing users to sync notifications from a host device and display them the Gear's screen when received, use Smart Relay to automatically open the relevant app for the notification on their smartphone or tablet, use S Voice for dictation and voice commands, place and answer phone calls, and locate the host phone or tablet, or vice versa with the "Find My Device" tool. Unlike the original Galaxy Gear, which ran Android, the Gear 2 runs Tizen, a Linux-based operating system co-developed by Samsung. As with the previous model, the device itself does not contain a charging port and must be placed inside a special Micro USB-equipped charging case. Despite having a smaller, 300 mAh battery, the Gear 2 has increased battery life over its predecessor, with Samsung rating it for 2–3 days of normal use. An optical heart rate monitor is located on the bottom of the device. As with the Galaxy Gear, the Gear 2 has a 1.63-inch, 320 pixel-wide square-shaped Super AMOLED touchscreen, 512 MB of RAM, and 4 GB of internal storage. The device's processor was upgraded to a 1.0 GHz dual-core Exynos 3250 system-on-chip. Two models of the Gear 2 were released, the Gear 2 and Gear 2 Neo the Gear 2 has a steel exterior and includes a camera, while the Gear 2 Neo is made from plastic and excludes the camera. This particular design change allows the strap to be user-replaceable. The Gear 2 retains a similar hardware design to the original Galaxy Gear, although a Home button has been added below the screen, and the device's 2-megapixel camera was moved from the strap to the top of the watch itself, alongside a newly added infrared blaster. Its successor, the Samsung Gear S, was released on November 7, 2014. The design of the device itself was also refreshed with the move of its camera from the watchband to the watch itself (allowing users to replace their own bands), along with the addition of an infrared blaster and optical heart rate sensor.
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In comparison to the Galaxy Gear, the most significant change made to the Gear 2 line was the replacement of Android with the Samsung-developed Tizen operating system, promising improved functionality (such as Samsung's S Health software and an integrated music player) and battery life. Unveiled on Februat Mobile World Congress, the Gear 2 line is a successor to the Samsung Galaxy Gear. The Samsung Gear 2 and Samsung Gear 2 Neo are smartwatches produced by Samsung Electronics. 1.63 in (41 mm) Super AMOLED with RGB matrix
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