Features 1、Included Accessories: Bike lithium modification controller kit contains 15A controller, LCD‑S866 meter, 130X shifter, 8C assist sensor. 2、Manufacturing Material: The controller housing is made of high quality metal with grooves designed to protect the internal circuitry from thermal overload due to good heat dissipation. LCD meter adopts high quality ABS material, light, rain proof, sturdy and durable. 3、Multifunction LCD‑S866 Display Meter: LCD‑S866 display meter has a variety of functions, LCD backlight display, can clearly display the status and data. When riding a bike, the product will display many useful data on your bike, such as power display, speed display, power indicator, fault indication, total mileage, single mileage, current speed, average speed, maximum speed, gear display, etc. 4、Wide Applicability: 15A controller kit is suitable for 250W, 350W motor, suitable for DIY electric bike, electric bike, electric scooter, folding bike, etc. Easy to maintain, the lithium ion bike modification greatly enhances the pleasure of riding and is suitable for cyclists who like a challenge. 5、Simple Operation: Simple to operate, easy to use, easy to install and disassemble. Without any difficult requirements even though you use it for the first time. Item Type: Electric Bicycle Modification Kit Weight: Approx.493g / 17.4oz Material: Aluminum Alloy + ABS Plastic Product Size: Controller Box Size: Approx.82 x 50 x 30mm / 3.2 x 2.0 x 1.2in Meter Size: Approx.81 x 48mm / 3.2 x 1.9in Rated Voltage Of The Controller: 36V DC 48V DC Controller Maximum Current: 15A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level BOOSTER: 1:5 Applicable Motor Power: 250W, 350W Controller Line Color Definition: 1. Yellow, Green And Blue Single Big Head Wire: Motor Phase Line 2. Red, White, Black, Blue, Green And Yellow Double Row Six Wire Port: Motor Hall Line 3. Red And Black Single Big Head: Power Cord 4. Red, Blue, Black, Green And Yellow Single Row Five Wire Port: Meter Wire (5PIN) 5. Black And Yellow Line (2pcs): Power Off Brake Handle Line 6. Red, Black And White Line: Throttle Shifter Line (3PIN) 7. Brown, Black And Yellow Line: Power Assist Sensor Line (3PIN) 8. Black And Red Wire (2pcs): Headlight Wire Meter Operating Voltage: DC 24V, 36V, 48V, 60V Compatible (Meter Selection Settings). Meter Function Description: 1. Display Function: Speed Display, Power Indicator, Fault Indicator, Total Mileage, Single Mileage 2. Control Setting Functions: Power Switch Control, Wheel Diameter Setting, Idle Auto Sleep Time Setting, Backlight Brightness Setting, Start Mode Setting, Drive Mode Setting, Voltage Level Setting, Controller Limit Value Setting 3. Communication Protocol: UART Display All Contents Of The Screen (Display All Contents For 1s After Startup) 3.1 Display Of Battery Quantity And BMS Remaining Quantity 3.2 Multi Function Display Area: Total Mileage ODO, Single Mileage TRIP (Unit: Mile, Km), Single Startup Time, Battery Voltage VOL, DST Battery Life 3.3 Speed Display Area AVG: Average Speed, MAX: Maximum Speed, SPEED: Current Speed, Unit: Mp/H Km/H The Speed Signal Is Taken From The Hall Signal In The Motor And Sent To The Meter By The Controller. (Time Of A Single Hall Cycle, Unit: 1MS) The Meter Will Calculate The True Speed Based On The Wheel Diameter And Signal Data (The Amount Of Magnetic Steel Required By The Motor Hall) 3.4 Vehicle Power Gear Adjustment, 0-9 Digital Display And Bar Display. Package List 1 x Controller 1 x Meter 1 x Meter Manual 1 x Throttle Shifter 1 x Assist Sensor 1 x Controller Wiring Manual