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 Charles Butler

This item is amazing for the price. I used it fully charged for several days before it died while using the horn. I played with the horn and used the light at full power. I also forgot that it has 5 sound options. The first sounds like an angry bird alarm, but if held for 4 seconds it changes to a different sound. If you don't like this sound, change it by pressing it again and holding it for 4 seconds. I found a buzzer that would work just fine. It's very noisy so I recommend covering it up while you do this or you'll disturb everyone around haha. Also, it's been through light rain and it's working great.