Google reveals first Android Wear watches to go on sale.
The first smartwatches powered by Android Wear operating system are now available for pre-order, Google have announced.
The LG G Watch and Samsung Gear Live - both featuring rectangular screens - mark an attempt to standardise the way Android wearable devices function.
Google said that Motorola's circular Moto 360 would not be released until "later this summer".
Analysts say the move to a unified approach could drive sales.
"Once you introduce Android Wear, it will hopefully provide a more focused case for what the devices are capable of. And that's a direction that could invigorate the market."
LG said the G Watch costs $229 (£145) and would initially be made available to 12 countries including the US, UK, France, Germany and Japan.
Samsung said the Gear Live would cost $200 (£118).
Both are due to ship on 7 July and will require the owner to have a phone running Android 4.3 or above.