The official launch of the Samsung Galaxy Watch 3 on August 5 is just a few days away. But that hasn't stopped the full specifications of the smartwatch from being released on the Internet as soon as possible.

Noted leaker Evan Blass posted a spec sheet for the Watch 3 on Twitter, revealing the full dimensions and internal construction of the 45mm and 41mm LTE models.

These leaked specs are largely consistent with previous rumors, but a few key features have been confirmed. They include a proper electrocardiogram sensor (ECG) for detecting heartbeats, which has been included in the latest Apple Watch models and recently in the Samsung Galaxy Watch Active 2. There is also a photoplethysmography (PPG) sensor that should allow monitoring of blood oxygen, one of the key features rumored to be included in the Apple Watch 6.

The leak also confirms the long-awaited return of the rotating bezel that was popular on the original Galaxy Watch. Both sizes of watches will be made of stainless steel and feature Super AMOLED Gorilla Glass DX displays, 1GB of RAM and 8GB of storage

. Aside from the obvious size difference, there are a few key differences between the 45mm and 41mm models: the 45mm model has a larger 340mAh battery compared to the smaller model's 247mAh battery, and depending on which version you choose, different color variations are The 45mm model comes in Mystic Black and Mystic Silver with a black leather band, while the 41mm model comes in Mystic Silver and Mystic Bronze with black leather and pink leather bands. [We'll find out if these specs are real on August 5, when Samsung will unveil the Watch 3 along with the Galaxy Note 20, Galaxy Z Fold 2, Galaxy Buds Live, and Galaxy Tab S7. Samsung's new wearable is likely to be a serious competitor to the Apple Watch 6 in both design and functionality.