At just over 3 inches long, the SwissTech Personal Alarm slips easily into a pocket, hides underneath your shirt, or clips to your belt or purse. It features a piercing 115 decibel sonic alarm, has two flashing red LED lights that serve as an emergency beacon, and also works as a flashlight with 2 extra bright white LED lights. The breakaway lanyard can be looped onto a purse strap or worn around the neck. Includes replaceable long lasting batteries.