https://www.reuters.com/article/us-fitbit-watches/fitbit-unveils-stress-tracking-smartwatch-with-google-deal-pending-idUSKBN25L1M2 >Fitbit Inc on Tuesday unveiled a fitness tracker and two smartwatches, including one that purports to help monitor users' stress levels, as the company's pending sale to Alphabet Inc's Google remains mired in antitrust reviews globally.