The horn is made of high strength ABS plastic. The light comes from three LED bulbs which can give out 20 lumen brightness. It is powered by 3 AAA batteries which are not included.
The maximum volum can reach 80dB. It can offer four sound modes.
It is a combination of horn and LED, so you can use it even if in the evening. You do not need to take the trouble of buying extra LED.

• Size:3.94*2.36*1.18inches
• Material: ABS plastic
• Electron loud alarm: good performance of 80 dB sound,loud enough to attract attention and warn the walkers.
• An easy clip allows for easy application to your handlebars.
• Waterproof: The button is make of waterproof silicon material, it is safety to ride in a rainy day, but don't put in the rainstorm or soak in water for a long time.

Size:3.94*2.36*1.18inchesslaid