Personal Alarm Keychain 6 Pack，Mesti 130db Personal Safesound Safety Emergency Alarms for Women, Kids and Girls, Self Defense Electronic Device as Bag Decoration

Super bright. I bought these for riding my bike at night and absolutely love them. I put one on my helmet and during my first ride it was lighting up signs (and turning them slightly blue) from easily 50-75 feet. Keep in mind that while 50-75 feet may not seem like a lot, I ride in an urban environment so there is plenty of light pollution. While wearing these I have no doubts that cars can see me easily.The reflective band is super long, probably about 18 inches. I use it on my left wrist to for visibility when using hand signals and it easily wraps around it at least two times, even when worn over a sweatshirt.

The lights are extremely bright. I put them on my dog's harness so we can be seen. He's a medium size dog, and the lights are bright enough to illuminate both of us.My negative review stems from durability. One of the lights clipped off his harness and fell about a foot onto the sidewalk (distance is being generous). The pin for the clip popped out, breaking the clip.***UPDATE***I was not asked to update my review, but the company did reach out to me and offered a replacement for the lights. Again, these are bright, and there could have been an quality issue with the unit that broke from the low fall.

We clip these on the top of our dogs' harnesses when they're out at dawn or dusk; they're sturdy enough for our big dog, and lightweight enough for our tiny dog (and she only weighs 3 pounds). They're also visible from all sides, not just from the front, which is an especially good feature. Our big dog likes to shake and roll, so we duct-taped the light-clip onto the velcro strap (it comes included in the package) and that keeps it secure even on a very active dog. I use the reflective band to wear one of these lights when I'm out at night myself too. Very good product!

A couple of them are loud and a couple of them don’t work. Can only use it as regular keychain for the ones that don’t work. Maybe got a bad batch. Like the individual packing with individual instructions.

These LED running safety lights are super bright. It's extremely hot in Florida and running either early in the morning, before sunrise or later in the evening is best to beat the blazing heat of the day. I use several different colors and always get comments from people I pass like, " I could see you coming from the end of my street", or "great colors!" I even use them on my dogs when I take them to my local golf course to get some all out running at night, these lights allow me to keep an eye on them in the dark.

I purchased this set of keychain alarms for my girlfriends to include in a gift bag for Christmas gift exchange. They were received enthusiastically and each one worked as described. Feedback from each person was very positive. This was their most favorite gift that was in the gift bag!

I love these lights. I ordered a bunch of these for my Ragnar team. They worked/work great. There light weight and bright. They were for our 24 hour relay race. Must of us clipped them on our rear shoulder area and forgot they were there. One person preferred them on the belt area. Happy to have them on for the night section. I felt safer.

These lights are about 2.5 inches long x 1 inch wide. They have two modes, on and blink. There is a spring clip on the back to clip it to backpack straps or other thin items. Also includes some short velcro bands to help attach to handle bars or other such items. The only ding on these is that to change the batteries they must be disassembled by removing several very tiny screws. Very tiny screwdrivers are included.