In order to make the products more durable, please connect the products in series. Using methord; 1.Please put the batteries into receiver, then turn on the power switch and lamp lighting. 2.Please turn on power swich of transmitter. Then press the button one by one.It indicates the transmitter is in good condition if the LED on receiver is red. 3.Please connect products in red& black plug .It indicates the line is ok if LED turns green. If the LED didn’ t turn on, it means the products is not connecting well. Pls check it. But it will not effect the other channels. 4.Please press the transmitter button to fire the products.