I will sell new kelly8430H controllers the bluetooth module is not included in the price. + 15 dollars. The maximum voltage of the battery is 105 volts. Details here http://www.cnqsmotor.com/en/article_read/DC%20Controller%20For%20Scooter,%20KLS8430H,24V-84V,300A,SINUSOIDAL%20BRUSHLESS%20MOTOR%20CONTROLLER/788.html