This ESC performs excellently with most motors. However, due to the limit of SimonK program, we do not recommend this ESC for those big pancake motors with large number of poles, such as SunnySky V40xx, X41xx motors. This is one of the best multirotor ESCs we have tested: quick response, smooth throttle, low running temperature, and high reliability. The ESC comes with no BEC. Featured with high efficiency, all N-channel MOSFET design, jitter-free hardware PWM input, and the most popular SimonK program, Velotech Magic speed controllers are an ideal choice for multirotors. Quality electronic parts are used to build Velotech Magic speed controllers, such as genuine Japanese Rubycon capacitor, IOR MOS tubes, heavy duty PCB. These parts cost much more than those cheaper counterparts that are frequently found in low price ESCs. The manufacturing process was strictly controlled and monitored to ensure all electronic parts are properly soldered. Every single ESC was examined in the factory with oscilloscope and other equipments, as well as burn-in test. This product is warranted for six month from the date of purchase to be free from manufacturing and component defects. Limited warranty is handled by Buddy RC at Columbus, Ohio. Specifications: Continuous Current: 40A Voltage Range: 2-4S LiPo BEC Output: None Refresh Rate: 600Hz Motor Wires: 14 gauge soft silicone wires Battery Wires: 14 gauge soft silicone wires Signal Cable: 30cm long, Futaba & JR compatible Weight: 32g (approximate, including wires) Dimensions: 60x28x10mm (approximate, including capacitor)
