This controller board and switch and original plug is suitable for 4815 Brushless Wrench ,Brushless Drill controller board and switch and original plug has been tested before sale.Do not worry the quality,the all is good quality,Its assembly includes controller board and switch and original plug. they can be used with large individual and domestic ranch brushless wrench,Brushless Drill.As long as the motor size is the same Original Brushless Wrench,Brushless Drill , DAYI 2106 original model.and many original model, it can check the original size, it is suitable for replacing, buy carefully! The wiring picture is shown below, and the last picture is the installation prompt.Please check carefully to avoid burning plates caused by poor installation. packing: includes controller board + switch +original plug( as pictures) Please note that the more your order, the more disnocount you will get. We will use the best products and services to help you. We want every customer to be happy every day We support purchase and wholesale Reminder: .[All Goods are in stock] [We Will ship within 1-2 days after your order is issued] [You Can receive the package within 5 to 10 days] [Check And properly package before shipping to avoid damage during shipping] [If The product malfunctions within 1 month, it can be replaced for free] Finally, please do not directly give us a "one-star" evaluation or bad review, you can contact us.We'll do our best. Give the best solution within one day. If you have any questions, please feel free to contact us, and please send massage, we will reply you as soon as possible. NoteThank you, happy shopping!