Features： 1、Heat Dissipation: The controller housing is made of aluminum alloy with a groove design, which has good heat dissipation performance and can protect the inner circuit to avoid thermal overload. 2、Durable: The panel is made of ABS material, light, sturdy and durable, with fine workmanship, good toughness and waterproof performance, providing better protection for the internal circuit and making it more durable. 3、Main Uses: Suitable for DIY electric bicycles, electric bikes, folding bikes, etc. Easy to maintain, bicycle lithium battery modification greatly improves the fun of riding, suitable for cyclists who like challenges. 4、Stable And Reliable: The controller has protection functions such as undervoltage protection, overcurrent protection, stall protection, etc., which ensures the use and safety of electric bicycles. 5、Multifunctions: When you ride a bicycle, panel will display many useful data on your bicycle, such as switch buttons, light switches, battery level display and other functions, a panel allows you to keep abreast of the situation. Suitable for 22.2mm handlebars and are easy to install and use. Specification： Item Type: Electric Bicycle Controller Kit Product Material: Aluminum Alloy, ABS Weight: Approx. 782g / 27.6oz Current Limit: 28A Controller Power: 500W Instrument Parameters: Suitable For Handlebar Installation: 22.2mm / 0.9in Diameter Handlebar Instrument Function Description: Display Function: Speed Display, Power Gear Display, Power Indicator, Fault Prompt, Total Mileage, Single Mileage, Headlight Display Package List： 1 x Electric Bicycle Controller Kit 1 x Panel 1 x Instruction Manual