Cycling without a bell is incomplete and especially when you go on a regular cycling spree, it is a necessity. The bells made by Volt are your necessary cycling companion and no matter what a sound system in your cycle saves you from risk. There are three models with the basic one called Callisto is a complete silver colored cycle bell. The Ardon model has combination of silver and black while the Hubble model is perfect for girls with pink colour body and a flower on top. All of the above models are made of alloy & plastic giving them durability.