The Samsung Gear 2 and Gear 2 Neo are smartwatches produced by Samsung Electronics. Unveiled on February 22, 2014 at Mobile World Congress, the Gear 2 line is a successor to the Samsung Galaxy Gear. 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. 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.