The "speed" Velocomputer case from Echowell is a practical accessory set specifically designed for the wireless Echowell bike computers. This set includes all the necessary components to ensure the functionality of your Velocomputer. It features a sensor with battery, a sensor holder, rubber, O-rings, and cable ties that allow for easy installation and secure hold. The case is made from high-quality materials that guarantee reliable performance and durability. The use of O-rings and rubber ensures optimal sealing and protects the sensitive parts of the Velocomputer from weather conditions. This product is ideal for cyclists who value precise measurements and ease of use. The "speed" case is an essential accessory to optimize your bike's performance and extend the lifespan of your Velocomputer.