Replacement On/Off switch with light indicator. Compatible with: Razor E200 version 1+Razor E300 version 1+Razor RX200 version 1+Razor PowerCore E100 version 1+Razor eSpark version 41+Razor Crazy Cart version 1+Razor Crazy Cart XL version 1+Razor Pocket Mod version 45+Razor Ground Force Drifter version 1+Razor MX350 version 34+ Razor Part #W13112445101 Note: Model versions can be determined based on the product ID code on your Razor product. The product ID code can be found on the battery cover and/or on the bottom of the frame. The 7th and 8th numbers in your product ID code are the version number of your Razor product (e.g. "01" = Version 1, "02" = Version 2, etc.).