The Pixel Watch is rumored to have a 300mAh battery which will last about a day and is expected to have sensors for heart rate, blood oxygen, and electrocardiogram or ECG. Other rumored specs include NFC, GPS, and 50 meters of water resistance.
An April leak had said that it would have a price of between $300 and $400 and Google said in May that its first watch will be a premium-priced product.
The Pixel Watch is also expected to have a Fitbit integration and Google is also likely to release a Google Pixel Watch companion app. It may also support Google Fi and let you use LTE data without a phone number. Unlike other non-Samsung Wear OS watches, it will apparently let you create cloud backups.