Electronic traps are relatively new. As the name implies, these traps kill mice by delivering a high voltage shock. Larger versions are available for trapping rats.
Pros. Electronic traps are considered humane because they quickly kill mice, as with snap traps. Also, their covered design means you don't have to view a mouse's remains.
Cons. Electronic traps are more expensive than traditional alternatives such as snap traps, glue traps, and live traps, and they require batteries.

