So, I recently purchased a personal safety alarm (siren) for my daughter, the She’s Birdie. The Birdie generates a siren of 130 dB, and strobe-light, for up to 40 min. with full batteries. This video will show you how it works. Note, it comes in numerous colors, including Aqua, Blossom (or Pink), Charcoal, Coral, Indigo, Lemon, Metallic Purple, and Metallic Rose.