4 Kanal 5V Relais Shield Modul für Arduino UNO R3 Relay Shield Interface 4 für
4 channel 5v relay shield module for Arduino UNO R3 Relay Shield Interface 4 Four Channel For PIC AVR DSP ARM MCU Arduino UNO R3. Relay: sky- 5V DC relay, model HJR-4102-L-5V, which Relay1 behalf of the 1st relay, the other and so on.