Features: Mountainous bike electric power conversion accessories 30A 3 modes sine wavy controller with SW900 LCD instrument. The SW900 display meter is with 5pin waterproof connectors designing specifically for 24V 36V and 48V systems. The controller is a sine wavy three modes examination controller, pair with Hall brushless motor, with self-learning function. Suitable for 36V750W 36V1000W 48V750W 48V1000W brushless motors with or without Hall effect. Metal housing, with excellent heat dissipation performances.