Commuter's Backpack Strap Safety Wearable

This backpack strap attachment is intended to be a discreet safety accessory for commuters.

The attachment will contain:
- An accelerometer
- A bluetooth module
- A microprocessor
- A vibration motor
- A rechargeable lithium ion battery

The device will remain connected to the user's phone via bluetooth during daily activities but will not send any instructions until the user performs a specific sequence of actions:
1. The user inverts the device by grabbing the tip of their backpack