DescriptionThe item is a professional and practical XRotor 40A brushless electronic controller ESC with no BEC output, which is a special core program for multi-rotor controllers greatly improves throttle response, and specially optimized software for excellent compatibility with disc-type motors. It supports 2-6S lipo battery, and is compatible with various flight-control systems and supports a signal frequency of up to 621Hz.Features- Brand: Hobbywing. - Model: XRotor 40A. - Color: as shown in the pictures. - Material: durable hard plastic and copper wire.- Size: about 68 x 25 x 8.7mm. - and XRotor 40A OPTO Brushless ESC Controller 2-6S for RC Multicopters XA. - Special core program for multi-rotor controllers greatly improves throttle response. - Specially optimized software for excellent compatibility with disc-type motors. - All settings except the timing are preset, making usage simple, highly intelligent and adaptive. - The twisted-pair design of the throttle signal cable effectively reduces the crosstalk produced in signal transmission and makes flight more stable. - Compatible with various flight-control systems and supports a signal frequency of up to 621Hz (Note: all throttle signals over 500Hz are non-standard signals) . - Special drive chip has much better MOSFET driving effect than common driving circuit consisted of discrete components. - MOSFET with extra-low resistance brings high performance and great current endurance.Specifications- Continuous current: 40A. - Peak current (10s): 60A. - BEC: NO. - Lipo: 2-6S. - Programmable item: Timing (High/Intermediate). - Typical applications (for reference): 550 /650 Class quadcopter.