Universal Parts Electrical Kit for Razor MX350/MX400 (Version 33+)Universal Parts 4 Pin Electrical Kit for the following Razor models: MX350 Dirt Rocket, Versions 33 and up MX400 Dirt Rocket, Versions 33 and up Note: Model versions can be determined based on your 8 digit product ID code. The product ID code can be found on the battery cover and or on the bottom of the frame. The last two digits are the version number (e. g. "01"=version 1, "02"=version 2, etc.) Electronic items are non returnable Compatible with