The multicatch trap is designed to capture and hold up to 4 mice at the same time, without harming them. A one-way flap entrance resets itself after being triggered, allowing more mice to enter to be caught Tunnel design serves to attract mice to enter the trap. Flap resets automatically behind the mouse when it crosses to reach the bait. Removable label reveals a clear plastic lid, which means you can see at a glance when you have caught something. Plentiful ventilation points reduce stress to caught mice Easy to bait and set - each trap is provided with full instructions for use.