1、Aluminum Alloy Controller Housing: The controller housing is made of high quality aluminum alloy with a grooved design, which protects the internal circuits from thermal overload due to good heat dissipation. 2、Display Meter Material: The meter is made of high quality ABS material, light, strong and durable, with fine workmanship, good toughness and waterproof performance, providing better protection for the internal circuit. 3、Multifunctional S900 Display: The S900 display has multiple functions and can be used as a trip computer and control the entire electric bike system after conversion, compatible with 36V and 48V voltage. 4、S900 Display Function Description:The color display makes it easier for you to view the data on the panel, such as speed display, power assisted gear display, battery indicator, fault prompt, total mileage, single mileage, headlight display, single driving time display, maximum speed setting, etc. 5、Wide Range of Applications: 15A controller kit is suitable for 250W, 500W motor, suitable for DIY electric bicycle, electric vehicle, electric scooter, folding bike, etc. Easy to maintain, can improve the riding fun, suitable for cyclists who like challenges. 6、Bicycle Modification Controller Kit: Bicycle lithium battery modification controller kit includes15A controller + LCD‑S900 display meter + 130X thumb throttle + 8C power assist sensor. Item Type: 36V 48V 250W 350W Brushless Motor Controller LCD Panel Kit Material: Aluminum Alloy + ABS Plastic Color: As Pictures Shown Weight: Approx. 636g / 22.4oz Product Size: Controller Box Size: Approx. 82x50x30mm / 3.2x2.0x1.2in Display Size: Approx. 110x62mm / 4.3x2.4in Controller Maximum Current: 15A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Booster: 1:5 Applicable Mtor Power: 250W, 350W Controller Wire Color Definition: 1. Yellow, green, blue single big head line: motor phase line 2. Red, white, black, blue, green, yellow double row six line port: motor Hall line 3. Red and black single big head line: power line 4. Red, blue, black, green and yellow single row five wire port: display line (5pin) 5. Black and yellow lines (two): power off brake lever line 6. Red, black and white lines: thumb throttle line (3pin) 7. Brown, black and yellow wire: power assist sensor wire (3pin) 8. Black and red lines (two): headlight lines S900 Display Function Description: 1. Display Function: Speed display, power assisted gear display, power indicator, fault prompt, total mileage, single mileage, headlight display, single driving time display. 1 x Controller 1 x LCD-S900 Display 1 x Thumb Throttle 1 x Power Assist Sensor 1 x Controller Wiring Manual