LED light equipped security alarm, gray color with a strap. - Color: Gray - Function: LED light - Accessories: Strap, instruction manual Thank you for viewing. In the first photo, pressing the button on the left turns the LED light on and off. Also, pulling the button with the thick string will sound the security alarm loudly. The strap is long, so it can be used by a wide range of people, from adults to children. Power source is two AAA batteries. In these times when groping and snatch-and-grabs are rampant, why not use this buzzer and light to deter the attacker when you can't shout out suddenly? Just carrying it around gives you a sense of security. Immediate purchase is welcome. Comments are also accepted.