Flashing light: When activated, the device releases an ultra-high pitch alarm along with a flashing light. Product dimensions: (L) 9.5cm x (W) 3cm x (L) with clip 13.5cm. Batteries included: Requires two CR2032 batteries. Protection: Designed to allow you to feel safer on the streets, alerting those around in an emergency. Carry clip: The alarm is small enough to fit in your handbag or pocket and features a carry clip so you can ensure it's always within reach. Safety alarm: Get a personal safety self-defence alarm with a light. Personal Safety Alarm & Flashing Light | Living Social | Living Social