Auto-level:Yes Input Voltage:4.8-6.0V AVR interface:standard 6 pin. Signal from Receiver:1520us (5 channels) Signal to ESC:1520us S1:Pre-installed firmware. Dualcopter Tricopter Y6 Quadcopter + Quadcopter X Hexcopter + Hexcopter X Octocopter + Octocopter X X8 + X8 X 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 you to adjust where and how much signal the motors receive from stick input and sensors. This allows you to create any configuration possible with up to 8 motors or servos. Weight:21 (Inc Piezo buzzer) IC:Atmega644 PA Gyro/Acc:6050MPU InvenSense Inc. Firmware Version:B:OpenAeroVTOL Colour:Green Material:PC+Metal Size:50.5mm x 50.5mm x 12mm Package Contents: 1 * Flight Control Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.