Specification:Universal receiver.Chip: Atmega168Gyro: ENC-03RC x3Length: 49mmFirmware: Quadcopter V2.0 KrPCB design based on kkmulticopter v5.5We can supply configuration X or + mode(please tell me know,otherwise we shipped it in X mode)Note: With firmware Quadcopter, other firmware please download from kkmulticopter.kr or kkmulticopter com and burn by your self.To update the firmware you need a USB ISP adapter (find in our shop) and some knowledge about AVR chips.Package Included:1 * KK programmable Module Multi-Copter 4-axis Main Flight Control Board2 * Dupont Cables