Vibrations are cool. I think. GeekAlerts write a post about this Vibrating Bluetooth Bracelet which give you vibrating alerts for incoming calls.

Vibrating Bluetooth Bracelet

Product Specifications

* Normal charging time: 3 hours.
* Stand-by time: up to 100 hours.
* Vibrating alert for incoming calls.
* Proximity vibrating alert when mobile is more than 5m away.

Link

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