The buzzer, the status LED and the power LED are contained in the MultiWii Mega set. The current sensor has to be purchased. The current sensor is to know the real time current. The lipo monitor is used to know the lipo battery’s voltage in real time. If the battery voltage is low enough the buzzer will start to beep. And different beep sounds show the different battery levels.
MultiWii Mega supports up to 8 channel transmitter, up to 8 motors, more than 5 servos and extra analog sensors or I2C devices.
MultiWii Mega can be connected to PC/Mac directly by usb cable :