IC: Atmega644 PA Gyro/Acc: 6050MPU InvenSense Inc. Auto-level: Yes Input Voltage: 4.8-6.0V AVR interface: standard 6 pin Signal from Receiver: 1520us (5 channels) Signal to ESC: 1520us Firmware Version: B: OpenAeroVTOL S1: Pre-installed firmware Compatible with Dualcopter, Tricopter, Y6, Quadcopter +, Quadcopter X, Hexcopter +, Hexcopter X, Octocopter +, Octocopter X, X8, H8, H6, V8, V6, Aero 1S Aileron, Aero 2S Aileron, Flying Wing, Singlecopter 2M 2S, Singlecopter 1M 4S (Custom Mix via the "Mixer Editor" option) The Mixer Editor allows adjustment of signal distribution from stick input and sensors to motors, enabling custom configurations with up to 8 motors or servos Color: Green Material: PCB Package Contents: 1 x Flight Controller Board Kit Note: Other items not included. Light reflection and display differences may cause slight color variations between image and actual item. Measurement error allowed: +/- 1-3cm. Product appearance, button colors, and small parts may vary by batch, but these differences do not affect functionality