Review on LETOUR Bike Light Set - USB Rechargeable LED Bicycle Headlight with Horn, Taillight, and Bell for Cycling Safety - Waterproof Bike Headlight with 3 Lighting Modes and 5 Sounds by Tyler Blake

They work well, definitely waterproof. The mount doesn't hold up well at all. Larger bumps or cracks will have the light on your tire. I bought 2 of these and was disappointed that the light is not the same. The lighter one has a matte plastic over the light that's also a bit yellowish. The one made of transparent plastic looks more like a flashlight, but shines much weaker. It also doesn't have a legal horn on it. All tones are very high. They sound like a very annoying alarm clock, but it's louder than the chimes I've generally used. I will still use it but I will not buy a product that is no longer reliable.