The trap pictured is a large rat trap of eBay not that expensive chocolate or peanut butter as bait works well if they are nice use the smaller size same bait not cheese ...works easily 29 caught mice last season in the greenhouse easy to doI put 3 of these around the house (wooden ones) about 3 years back but never caught anything, I'm hoping these noise sensor plugs I've put around the flat do the job,