Balancing Scooter Circuit Board Replacement Parts. will fit for Two Wheel Balance Scooter Single System. Please note: does not fit for Dual System Motherboard Controller.36V/42V Charger, Suitable for 6.5"/7"/8"/10" Two Wheel Self Balance Scooter UL 2272 certified 1 X Main Control Motherboard2 X Intelligent Attitude BoardPlease check the pictures and specifications for compatibility.