This TURNIGY Sentry 40A Brushless Speed Controller is a high-quality product perfect for your radio control needs. It is designed for brushless motors and is compatible with a variety of motor types. The brand Turnigy is known for its expertise in radio control and this product lives up to that reputation. The item is new and comes in an open box, ready for use. It is a great addition to your collection of RC model vehicle parts and accessories. Whether you are a hobbyist or a professional, this speed controller will provide the necessary power and control you need for your radio control projects.