Google released the LG G Watch and Samsung Gear Live at its I/O developers' conference in San Francisco this week.
CBR tells you five things you need to know about the latest specs, availability, competitors and reviews.
LG's model, first introduced in March, and Samsung's Gear Live weigh 63g and 59g respectively, and both have rectangular faces.
Running both on the Android Wear operating system, the Gear Live measures in at 37.9mm x 56.4mm x 8.9mm, which is thinner than the LG G's dimension at 37.9mm x 46.5 x 9.95mm.
Both watches come with removable stainless steel straps, which include titan black and white gold for the G Watch it claims are 'easily cleanable', and red or black for the Gear Live.
The Gear Live has a higher resolution of 320x320 and uses Super AMOLED technology compared to the G Watch's 280x280 screen, which uses in-plane switching technology (IPS).
Although both watches are powered by a 1.2GHz processor, Samsung did not specify the type, while LG G said it uses a Qualcomm Snapdragon 400.
Gear Live has up to 300mAh of battery life, while LG has more with 400mAH, but both batteries should last about a day, according to LG and Samsung.
They're also dustproof and water-resistant, meaning they can sit in 1m of water for 30 minutes, and feature the same 4GB of integrated storage and 512MB of RAM as well as Bluetooth 4.0 LE.
The watches are supposed to act as a companion device for an Android phone running the Android 4.3 operating system and higher. Calls can be taken via the wrist, while the screen notifies users on incoming emails, phone calls, text messages and social media updates without having to check their phone.
Voice commands are also included thanks to the Android Wear platform, allowing users to ask questions or make orders after they say "Ok Google". Similar to personal assistant Google Now, you can read and dictate messages and check facts on Google's database.
Although there's no camera, a 'Do not disturb' option disables notifications for set periods of time, and users can also control music for their smartphones from the watches.
There's an extra built-in heart rate monitor for the Gear Live that tracks and shows your heart rate, with an accelerometer inside it that tracks your steps.
The full Android Wear software developing kit is also available to developers so more apps will be available to users on the watches' release.