【Brand and Model】 This is a set of CAT EYE cycle computers, MICRO WIRELESS and VELO 9. It's a reliable brand that provides highly accurate data. 【Features and Convenience】 These cycle computers display important data such as speed, distance, and time in real-time. In particular, the MICRO WIRELESS allows for wireless data transmission and is easy to install. 【Accessories and Battery】 A sensor is included, so you can use it right away. It also uses button batteries, which are easy to replace. - Brand: CAT EYE - Model Name: MICRO WIRELESS - Model Name: VELO 9 - Accessories: Sensor - Battery: Button battery (CR2032) A test battery is included, so please refer to it and purchase the same model. Please consider the VELO 9 body as a bonus, as the wireless set is complete. Thank you for viewing.