PLEASE CHECK BEFORE BUY: nr 1 arduino 2009 or Uno. Nr 1 rele 4 channel shield. Nr 1 x 6 wire connector. Arduino IDE 1. 0. 5. Program arduino correctly: version and libraries Ask me. Ask me for manual, tick and trips. Smartphone / tablet with bluetooth. Arduino Uno Shield + Android bluetooth interface + external 4 channel relais card.