Feature: control board for multi-rotor aircraft (Tricopters, Quadcopters, Hexcopters etc) so as to stabilize the aircraft during . High performance,easy and convenient to use.Updated to an incredibly sensitive 6050 MPU system making this the most stable KK board ever and allowing for the addition of an auto-level function. Uses signals from your radio systems receiver (Rx) and passes these signals to the Atmega644PA IC via the aileron, elevator, throttle and rudder inputs.Once this information has been processed the IC will send varying signals to the ESCs which in turn adjust the rotational speed of each motor to induce controlled (up, down, backwards, forwards, left, right, yaw).Size:Approx.51x51x12mm/2x2x0.47inchSpecification:Built-in mode:DualcopterTricopterY6Quadcopter +Quadcopter XHexcopter +Hexcopter XOctocopter +Octocopter XX8 +X8 XH8H6V8V6Aero 1S AileronAero 2S AileronFlying WingSinglecopter 2M 2SSinglecopter 1M 4SSize Chart:IC: Atmega644 PAGyro/Acc: 6050MPU Inc.Auto-level: YesInput Voltage: 4.8-6.0VAVR interface: standard 6 pin.Signal from Receiver: 1520us (5 channels)Signal to ESC: 1520usFirmware Version: V1.17S1Package Includes:1 Piece Controller Board :Due to the difference between different monitors, the picture may not reflect the actual color of the item.Due to manual measurement, there may 1-2 error in size. Note: 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.