Specifications: High quality brushless UBEC replacement parts. Excellent output ability of continues current of 40A. Premium material made, stable and reliable. Ideal speed controller for RC/FPV/Quadcopter/RC Airplanes and others. Type: 40A Brushless UBEC Material: Plastic Output Continuous Current: 40A Output Short Time Current: 55A (No Less than 10 Seconds) Power Input: 2-4 x Lithium Batteries (Not Included) BEC Output: 5V@3A (Stable Linear Mode) Maximum Speed: 2-pole Motor 210000rpm, 6-role Motor 70000rpm, 12-pole Motor 35000rpm Features: Durable, Speed Controller, 40A, Universal Size: 68mm x 25mm x 8mm/2.68" x 0.98" x 0.31" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x 40A Brushless UBEC