Our Cockroach Repellent Box contains Camphor Tree Oil, Lavender Essential Oil, Peppermint Extract. It can continuously release the active ingredients, maintain the indoor environment for a long time, and prevent cockroaches from invading again. Its use is very simple: open the lid, take out the white washer inside, then tighten the lid, and put it in the area where cockroaches are often found. Can be a powerful cockroach repellent, the effect is remarkable. And effectively reduce the number of cockroaches.