Perfect. I have two genuine ones and I bought these as a deterrent at two points, also from the outside, as a complement. If you don't see them up close, you wouldn't be able to tell if they are real or not. Uses 3 AAA batteries (I used rechargeable ones from Eneloop Panasonic that may not need recharging for up to 7-8 months, so I don't have to worry). For wall mounting, you need to carefully measure the distance between the centers of the two mounting holes and drill them, insert the screws, turn them, and they are already fixed. They already come with plugs and screws, as well as a sticker.
