HQT Bluetooth Mobile Incoming Call Alert & Flashing Light Gadget Incoming Call Alert - Blue & Red LEDs flash (alternatively) on incoming calls Auto Flashing - Flashes light (blue) automatically as soon as senses any motion or shaking. Safety Feature - Blue flashing light while motion can also be used as a safety or alert device to lets others see you coming, especially when riding in the dark (flashes every second). Anti-Theft Feature - Flashes when separated from your mobile 30 feet or more Easy Auto Pairing - Simply turn mobiles Bluetooth ON to pair it (default password 0000) If pairing fails, press top button to force new pairing