Your body exhibits signs of stress far before you may even realize you’re anxious, angry or upset. A new wrist-worn device by Boston-based Neumitra monitors your vital signs and alerts you when you’re stressed out. The Bandu measures your autonomic nervous system by tracking your perspiration, respiration, and heart beats with the help of a mobile device. When these vitals get out of whack, Bandu offers suggestions, like “take 5 deep breaths”, “play a song” or calling a loved one to help you calm down. The inventors of the device hope to help those with psychological disorders like PTSD as well as people who cope with everyday stressors like traffic, work, and family.