CRIUS MWC MultiWii SE V2.5 Control Board W/GPS NAV Module Combo Small size,35x35mm mounting holes . 6 PWM input channels for standard receiver or PPM SUM receiver . Up to 8-axis motor output . Supported 2-axis gimbal and auto trigger controll . FTDI/UART port for upload firmware, debug, Bluetooth module or LCD display . I2C port for extend sensor, I2C LCD/OLED display or I2C-GPS NAV board for GPS and Sonar . Ultra low noise 3.3V LDO voltage regulator . ATMega 328P Microcontroller . MPU6050C 6 axis gyro/accel with Motion Processing Unit . HMC5883L 3-axis digital magnetometer . BMP085 digital pressure sensor . PCA9306DP1 logic level converter . Other: Dimension: 40mmX40mm . Height: 11.6mm . Weight: 9.3g . Fixing hole spacing: 35mm (It can be changed to 45mm by CRIUS Distribution Board) . Hole diameter: 3.1mm . NEO-6M GPS Module . Feature: Package Includes: 1x MWC V2.5 SE Flight Control board. 1x I2C-GPS NAV Module. 1x NEO-6M GPS Module. 1x CO-16 OLED Display Module. 1x Bluetooth module