Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent personal alarm

These are terrific! I use the armband alarm when I am walking / jogging in the evening, even in my suburban neighborhood. The smaller wrist alarm is great for when I am going to the car or walking back to my hotel at night when I am travelling for work, especially in unfamiliar cities. The alarm is much louder than any whistle I've come across, and the light helps any would-be rescuers find where the sound is coming from. I am planning to buy a set for my mom and my sister too.