If you are choosing between a rat and mouse version - to me the rat versions are the best because this OWLTRA OW-1 Indoor Electric Rat Trap will also catch mice. Our mice can be quite large - especially around the bird feeders.
What attracted me to the OWLTRA OW-1 Indoor Electric Rat Trap was the lower cost and the multipack. I use these electric traps outdoors but usually place them under rocks, so the less costly indoor trap is what I ordered - when ordering more, I will go with the outdoor version as water did enter one of the traps during a very light rain last night. Update: constructed a little house for this rat trap to keep the rain and snow out - works great.
This OWLTRA OW-1 Indoor Electric Rat Trap was placed outside (alongside my well used Victor) and the OWLTRA trap was the victor (pun). A very large rat was finally no more. I do find this to be way more effective and humane than the snap traps, as the snap traps often catch only a leg or 1/4 of the body and that's just cruel. The pack rats are so smart and adorable looking as they have big whiskers and tend to be very healthy looking with big eyes - so not seeing them is imperative for me.
I use peanut butter with a bit of chocolate and, with this trap, there is a little area where you can easily place a tiny bit with a knife onto a tray area in the back of the trap - it really doesn't take much to attract the vermin so less is better. Added a video to show the victor and the Owltra rat trap little areas for food.
The other benefit is this OWLTRA OW-1 Indoor Electric Rat Trap is it's really much easier to open and clean than the Victor that I have. I simply turned this trap upside down into the garbage and never had to touch or see the rat. I'll update this review if this product doesn't last very long or if it malfunctions, but so far so good. Update** Still working great after about 2 months (my Victor seems to be on its last leg but it worked hard for two years).
With so many choices for electric rat zappers, I'm glad to have chosen this one - it's well made - a good value, so simple to use, and effective. Added a video to this review in hopes it might help you decide if this product will work out well for you (also included what batteries we use).