If you're looking to add a little extra security to where you're staying, whether at home, dorm, hotel, apartment and more, this doorstop security alarm No 266 resists someone opening the door and sounds a piercing alarm. You can travel with this, or install permanently with screws. The instructions for both ways to install, temporary or permanently are on the box. It measures approximately 6" L X 2 1/4" W and uses 3 AA batteries, which are not included. This does not come with the…