Vigilant Three-In-One DogGone Utrasonic Dog Repellent Siren with 110dB Vigilant Human Repellent Personal Alarm and Dual LED Flashlight (Green) 110dB Vigilant personal attack/rape alarm (sounds like a car alarm) Dual LED flashlight which also serves as the low battery indicator Ultrasonic dog animal repellent 9-volt alkaline battery and wrist strap are included Excellent for outdoor sports enthusiasts, walkers, runners, elderly, delivery drivers, utility workers, or anyone else who spends time outside in uncontrolled situations.