The Moto 360 is an Android Wear-based smartwatch announced by Motorola Mobility in 2014. It was announced on March 18, 2014 and was released on September 5, 2014 in the US along with new models of the Moto X and the Moto G. Hardware and design The Moto 360's form factor is based on the circular design of traditional watches, supporting a 40mm (1.5 in) viewing diameter and circular capacitive touch display. The case is stainless steel and available in different finishes. Removable wrist bands are available in metal and natural leather. The watch is water resistant and has only a single physical button. The watch has an all day battery, and rather than needing to be plugged in, it charges wirelessly by being placed on an included cradle. Internally it has dual microphones for voice recognition and noise rejection and a vibration motor allowing tactile feedback. An ambient light sensor optimizes screen brightness and allows gesture controls such as blanking the screen by placing one's hand over it. Bluetooth 4.0 is included for connectivity and driving wireless headphones. In the June 2015 release notes, Motorola announced Wi-Fi support for the device, such that it could be used out of Bluetooth range. A heart-rate sensor and 9-axis accelerometer support health and activity monitoring. It has IP67 certification for dust resistance and fresh water resistance rated at 30-minutes at 1.5 meters (4.9 feet) depth. Software The Moto 360 runs Android Wear, Google's Android-based platform specifically designed for wearable devices. The 360 currently runs Android Marshmallow and pairs with any phone running Android 4.3 or higher and any iPhone running IOS 8 or higher. Its software displays notifications from paired phones. It uses paired phones to enable interactive features such as Google Now cards, search, navigation, playing music, and integration with apps such as fitness, EverNote, and others. Reception Ars Technica criticized the "terrible" battery life and performance, blaming it on the outdated SoC (system-on-chip) used in the Moto 360: "Motorola inexplicably chose an ancient 1GHz single-core Texas Instruments OMAP 3". In a review for Engadget, Jon Fingas wrote, "The interface isn't that great at surfacing the information I need at the time I need it, for that matter. Spotify's Android Wear card always showed up on cue, but Sonos' controls appeared inconsistently even when there was music playing. And the watch frequently defaulted to showing apps that weren't really relevant to