It's Votol EM 150 Votol EM150 EM150SP 150A CAN Votol Controller for electric scooter, electric motorcycle, max battery current 150A, peak phase current 380A. EM series controller is sine wave type controller, which is brushless DC controller with flux-weakening. EM150sp is cost effective controller with waterproofing grade IP67, suit for 3-5kW motors.