1?��CONVERSION KIT: Electric bicycle lithium modification kit contains 17A three mode sine wave controller, for S900 LCD meter, can be used alone or in combination 2?��PERFECT REPLACEMENT: Controller kit is suitable for 24V 36V 48V 250W?350W with Hall brushless motor, which can be used for the modification of electric power bicycles, electric bicycles, electric scooters and other damaged parts replacement, you can modify and use according to your own situation, so as to improve the fun of riding 3?��SUPPORTED MODE: Controller kit is equipped with self learning function. When the Hall motor is working normally, it is in sine wave mode. When the Hall motor is damaged, it is switched to no Hall square wave mode 4?��COMPLETE DISPLAY: The for S900 LCD instrument shell is made of ABS material, and the display screen interface is clear, provides you with a variety of vehicle control and digital display of vehicle status, which can display the riding speed, riding distance, boost gear, power indicator, fault code prompt, headlamp display, motor running power, etc., which is easy to read the data during riding. The button is quick to operate and easy to use 5?��COOLING ALUMINUM ALLOY: The controller adopts excellent aluminum alloy shell with groove design, bring good cooling performance, can protect the internal circuit, so as to avoid thermal overload. LCD meter is suitable for 22mm handlebars and is easy to install and use