b' Features: The board use of Immersion Gold PCB processing technology The motherboard not only all the digital and analog interface to the form of rudder line sequence to expand out,But also Bluetooth-compatible module communication interface,SD card module communication interface,APC220 radio frequency module communication interface,and for RB URF v1.1 ultrasonic sensor interface,independent expansion easier to use For beginners,don for t need to headache for the complicated Circuit connection, this sensor expansion board will really simplify the circuit, can easily connect commonly used sensors, a sensor only needs a common 3P Sensor connection cable (regardless of digital cable and analog cable), complete the circuit connection, the preparation of the corresponding program downloaded to the MEGA controller to read the sensor data, or receive wireless module back to the data, after processing, Easily complete your own interactive work Product Size: about 10*5.30cm/3.94*2.09 No Retail Packages Quantity: 1Pc Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package include: 1 x Sensor Shield V1.0 Module'