MENGAPA BERBELANJA DI TOKO KAMI 1. Quick Respond.. OK 2. Quick Delivered.. OK 3. Packed Safely.. OK 4. Article and Description Available.. OK Spesifikasi Produk 1. The RS485 module 2.The RS232 module(green DB9) 3.EEPROM (24 c16) 4.Three leds 5.Three buttons 6.A buzzer 7.4 in 1 digital tube 8.The rest of the IO mouth raises 9.TF card module (SPI) Package list: 1 X GPIO Extension Board ( not include Raspberry Pi )