Description:<br /> <br />Model A is for customers who like pedal assistance more<br />Called pedal assist 5 gears controller and LCD meter sets<br />General introduction<br />Adjust the 1:1 assistance power, each gear has different max output power, 0 gear-shut down assistance, (only mechanical work) . 1-5 power rate<br />1 gear 20% speed<br />2 gear 40% speed<br />3 gear 60% speed<br />4 gear 80% speed<br />5 gear 100% speed<br /><br />Under each gear the no-load speed will be full.<br />Unique power assistance gear design, can adjust the power without limit the speed.<br />Use the power supply reasonably, and extend the range, provide different power according to different road condition, <br />make your riding very comfortable. The other competitive products has power assistance gear but to adjust the speed only, <br />never considered controlling  the current, that waste the power and miss-stepping will happen.<br />Unique low power mode design will control the discharging when power is low.<br />The battery will be easily damaged when power is low. When you are riding, if power is low, that will appear &amp;lsquo;stop-and-go'. This model has low power control mode to solve this phenomenon to protect your battery and make your riding comfortable. <br />Can adjust speed limit-use the spin button to adjust the max rotate speed of motor accurately.<br /> <br />Controller function brief introduction:<br /><br />1. Speed control handlebar throttle: can connected with common handle bar, potentiometer, pedal accelerator, <br />default start stationary state: green signal wire has 0.8v voltage, when reach to 1v, bike moves, and reach to 3.4v, <br />bike reach to full speed, if 3.6-4.2v, bike will not move.<br />2.    Brake and cut off power-low level brake, connect with brake handle switch, after the operation of mechanical brake, <br />cut off signal into controller, the controller is cut off power.<br />3.Speed limit adjustable-adjust the motor maximum rotating speed at any rate by turning button, <br />mainly used to adjust bike top speed, or rotative speed difference of two motors.<br />4.1:1 power assistance &amp;ndash;this function mainly used on pedal electric bike, (which with assistance sensor and Magnetic encoder on pedal axis), <br />pulse signal of different frequency is sent by pedaling harder or slower, the controller push motor turing<br />5.Led meter-has function bellow: indicate battery level, output power, speed, assistance gear adjust and indicate, <br />singe range, cruise, failure, historical range, running time, wheel rotating speed&amp;hellip;<br />6.Self learning- connect power cable, motor phase wire, hall wire, main switch wire, handle bar wire, learning wire, <br />switch on power and bike lock, the motor will start to work. If the turning direction is right, please cut off learning wire. <br />The learning is finished. If direction is opposite, please cut off learning wire, the motor will switch direction automatically, work 2-3 seconds, cut off learning wire, the learning is finished.( attention please !cut off learning wire after learning)<br />7.Cruise- default setting : keep bike rung a