Features:90dB Sound, Replaceable Battery: 90dB is loud enough to alert someone that a bike is coming, can be used in daily commuting. 3 different ringtones are available, just long press for 3s to switch. Tips: the built-in battery is can changeable, please replace the lossy battery to obtain better effect if after a long time of transportation and storage.Water-Resistant Silicone Cover: This bike bell cover is made of soft silicone material, which will not damage the bike paint, the water-resistant and dustproof design greatly extends the service life. It is not recommended to get in the rain for a long timeMini and Useful: Small and portable, suitable for road bikes, mountain bikes, kids bikes, city bikes, or other types. It can be stored directly in a pocket or bag when not in use.2 Easy Installation Ways: Easy to secure and remove, no tools needed, silicone cover is high-elastic so that you can adjust it to different diameters, great for most bike handlebars. Vertical installation and horizontal installation are available, more comfortable to use.Specifications:Material: SiliconeRinger Volume: 90dBRingtones: 3Application: for Road Bikes, Mountain Bikes, Folding Bikes, etc.Product Size: about 12 x 5 x 5cm or 4.7 x 2.0 x 2.0inNotes:Please allow a slight dimension difference due to different manual measurements.Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Package Contents:1 x Bike Bell Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.