She's A Birdie Safety Alarm 3.0 $22

The best-selling She's Birdie Safety Alarm 3.0 drops from $29.95 to $22.35 in most colors at Amazon. It's rarely on sale, and this matches the best deal we've ever seen on it (even for previous models). This keychain safety alarm emits a 130-decibel alarm sound and strobe light when activated. Unlike a pepper spray keychain, the Birdie alarm is reusable and travel-friendly (it's allowed on airplanes). It's rechargeable and has a built-in flashlight. Shipping is free with Prime or when you spend $35. Otherwise, it adds $6.99.