This bicycle electronic horn, using buzzer sound, can make a sound, volume decibel value up to 120dB, built-in replaceable 2 CR2032 batteries. Installed with silicone straps, suitable for Ordinary bicycle / Road bike / Mountain bike / Electric bike scooter Children's scooter. Specification Size:76x44x36mm Label: Yes Product material: Plastic Color: Black, Blue, Red Decibel: 120dB Waterproof level: IPX4 Battery type: 2xCR2032 Packaging: Color box packaging Packing accessories 1x Horn, 1x Anti-slip Rubber Pad,1x Manual, 2x Silicone Straps Notice 1, Bicycle electronic horn sound is large, please do not play the sound to the narrow indoor space or to the ear, so as not to cause unnecessary harm; 2, The product contains 2 CR2032 batteries, please do not close to high temperature or fire, used batteries please environmental protection treatment, do not throw away.