ktwend zk2430-d-fs-rohs 24v 4-wire electrical controller fits for razor mx350/mx400 (v33+) for versions 33+ only replacement controller for electric rocket scooter bicycle dirt bike pocket scooters is up for auction in Electronics. The current bid is $1.00, 96% below the $27.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.