According to the sellers of this product it is the greatest thing since sliced bread and you never even have to handle the mice, or rats, it kills.
It does operate on batteries so you will need to, periodically, replace the batteries, and unless you like the aroma of decaying mice, or rats, you will need to check and pick up those bodies. This is a passive device and waits for the mice, or rats, to come to it so as always the most bestest way to keep rats and mice, and other thingys, out of spaces you don't want them in is to close up any point of entry they could use.