Coming in sporty colours like black, white, or flame orange, its silicon band all-in-one construction means it has IP67 dust and water resistance (not for swimming). Its 1.37” AMOLED display covered in Gorilla Glass 3 is great at any time in any light. It has an always on black/white display reserving colour when you activate it.
It has a GPS and continuous heart-rate monitor and works with Android and iOS. Like most fitness devices, it uses a multi-axis accelerometer to provide altimeter (steps up), pedometer, speed, and gyroscope (directional) data.
Interestingly the Moto 360 Sport has dual digital mics — needed for Moto Voice, OK Google or asking Siri what she thinks about Cortana — but it does not have a speaker (uses Bluetooth buds or a smartphone). It charges wirelessly via a dock (supplied). The battery lasts for a day of mixed use.
The strength of any fitness smart/watch is its apps. iTWire has not reviewed this and thus cannot comment but (a) it runs stock standard Android Wear and (b) that opens it up to many apps and specific fitness apps like Fitbit 3, MapMyRun, Under Armour Record, Google Fit, and Strava. Moto Body (not on iOS at present) records your workout data and syncs directly with these apps, so your workout history is always up-to-date.
Moto 360 Sport has 4GB RAM and a GPS so you can go for a run and sync to a smartphone later. Storage can be used to sync music from Google Play for music, and it will pair to Bluetooth buds.
Early international reviews say it is a sports watch – not suitable for suit wearers. It does support most smartphone notifications, and the range of Android Wear apps (most at extra cost) can make the best use of the hardware.
My advice, without having seen or reviewed it, is that at $449 there is a lot of excellent competition like Samsung’s Gear Fit 2 ($189) or Microsoft's Band 2 (on special at $288), so you need to ensure it suits your style and needs.