Meet Occly: a personal safety device that you can wear on your body to stay out of trouble outdoors. It has 4 cameras for close to 360 degree coverage, sirens, a microphone, LED lighting, and Bluetooth. It records images and audio around you and sends them to an emergency response center when you are in trouble.
The battery life lasts up to 8 hours. The app keeps you informed of notifications specific to an area and lets you send alerts to your friends. More info is available here.