Apple unveils Apple Watch Series 6 that measures blood oxygen level in 15 secs

Apple on Tuesday unveiled the Apple Watch Series 6 smartwatch that can measure the user's blood oxygen level from the wrist in 15 seconds, starting from $399. A new sensor shines red and infrared light into wrist and measures the amount of light reflected back to ascertain oxygen level. Apple also unveiled 'solo loop' band style for a new smartwatch.