Placa de desarrollo UNO R3 ATMEGA328P CH340/ATEGA16U2 Placa ARDUINO MKR RELAY PROTO SHIELD PLACA DE DESARROLLO AZUL Plaque Développement Relais Arduino Mkr Relay Proto Shield Arduino Placa De Desarrollo Azul Steckboard Carte Relay Proto The shield provides two on board relays and a small prototyping area if you need to add some other component to your project. The MKR Relay Protoshield allows you to easily add relays to your MKR board based project ARDUINO KR RELAY PROTO SHIELD PLACA DE DESARROLLO AZUL