Dilwe Brushless Motor Controller, Stable Less Noise Brushless Speed, 24V/36V Product Features HEAT DISSIPATION SHELL: Brushless motor controller shell is made of aluminium alloy, which can protect the inner circuit and good for heat dissipation to avoid thermal overloading. STABLE AND LESS NOISE: Brushless speed controller is a brushless motor controller, it can provide steady speed, silent working, sensitive control of braking and direction changes. EFFICIENT AND ENERGY-SAVING: More efficient and more energy-saving. It can automatically identify the phrase angle and rated voltage of electric bike. DURABLE WIRES AND INTERFACES: The wires and interfaces are durable, and ensure low malfunction of long time use. Each interface has different color for your easy installation. GUARANTEE: If you are not satisfied with our product you received, you can send emails to us at any time. We will reply you instantly and help you solve your problem. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!