1.The light on the plug will be red when the trap begins to work. It is very safe for baby, pets and the old at home: It will turn off automatically when you take the lid away
2.Put the bait on the top box of the trap, and cockroaches will come from every corner. There are many mesh entrances for them to enter and kill them in a big amount
3.The intervals of the electrodes are 4mm, so it can even catch very tinny new-born roaches
4.You can clean the dead bodies of the cockroaches with hard card, and then clean the board with wet cloth, and put it under sun for a while.