120dB bicycle horn: one sound, normal horn sound. The sound is very loud and clear. The bicycle horn is loud enough when riding outdoors. Bike bells are suitable for road bikes, mountain bikes, city bikes, sport bikes, cruisers, mountain bikes, BMX, electric bikes, etc. Both adults and children can use them. IPX4 waterproof and shockproof: the bicycle bell is waterproof and can be used even in the rain. Warning: Do not immerse the horn in water. High quality material: The mini bicycle bell is made of high quality ABS and rubber pads, which can make the bicycle horn more stable and durable, and can be used for a long time. Battery compartment : Battery voltage: 3V2, two batteries can be used for about 1 year. The battery is Cr2032. (There are already 2 batteries inside the bicycle horn) Packing list: You will receive 1 black bicycle horn, 1 short strap, 1 long strap, 1 fixed seat non-slip pad. The bicycle bell is installed through the hook on the back, the strap is elastic and delicate, with 2 different sizes of rubber straps, you can easily adjust it to different sizes; suitable for most bicycle handlebars with a diameter of 22.2-32mm, easy to wear and assemble.