The navigation board includes the sensors and a 40 MIPS microcontroller with a fast 12 bits ADC converter.The navigation board has one ultrasonic transceiver and one ultrasonic receiver to measure the height of the drone up to 6 meters / 20 feet.This kit includes 1 navigation board and 4 screwsAn altimeter to adjust the altitude with greater precision
AR Drone 2.0 Navigation board
Brand: Parrot, Model: PF070041AA, Color: Black, Size: One Size