Here is a smart wearable device that lets you get help when in trouble. Nimb is a smart ring with a panic button. Hold it for 3 seconds to send your profile info and GPS coordinates to your circles. You are in control of whom gets your messages.
Nimb has a 3-color LED, hidden button, vibration motor, and rechargeable battery. It will be compatible with iOS and Android devices. The battery life lasts for 2 weeks. The product is expected to ship in Jan 2017.