Effective control indoors or out. Kills Norway rats, roof rats and house mice. For use within 50 ft in and around agricultural, port or terminals buildings or inside of transport vehicles (ships, trains and aircraft) only. Pests may consume a lethal dose in one single night’s feeding with first dead rodents appearing 2 or 3 days after feeding begins. Stop feed action causes rodents to cease feeding after consuming a toxic dose. Effective against anti-coagulant-resistant mice and rats. Contains 88 pellet packs. Contains the active ingredient bromethalin (CAS #63333-35-7).Contains the active ingredient, bromethalin, a nerve poison that’s extremely toxic to house miceBromethalin is not an anticoagulant-type rodenticideHouse mice, Norway rats and roof rats may consume a lethal dose in a single night’s feeding, but it may take two or more days from time of bait consumption for them to dieDue to stop feed action, rodents cease feeding after consuming a toxic dose