Brand new and high quality.Six different sounds are very resounding.Easy to install and fit for all bicycles.Superior quality, fine workmanship and waterproof. Material: Reinforced plastics, electronic components. size: 8.8*4.0*5.4, the control line is about 20CM long Colour: Black Applicable: about 2.2cm diameter It's not big, but the ringtone is very loud and the sound in the downtown area is also outstanding; Beautiful appearance, meticulous workmanship, waterproof design for life; Easy to install, can be installed on any type of bicycle; Press and hold the button to make six different sounds; Exquisite workmanship and waterproof design Very easy to install and can be installed on any model of bike. Choosing a good bell will not only facilitate travel, but also greatly improve riding safety! Product list: 1*Speaker