Wireless alarm with infrared sensor. - Model: SE-2 - Function: Infrared sensor - Power: Uses a 9V battery - Installation: No wiring required - Switch: CHIME/OFF/ALARM Thank you for viewing. The items in the images are all that is included. Please make your assessment based on the images. Everything in the photos is included. There are no other accessories. Due to this being a single item, returns and exchanges are not accepted, so please understand this before purchasing. No claims or returns accepted. We will ship promptly. We deal with many used items, and even new items are often from storage. The exterior may have scratches or damage, so please refrain from purchasing if you are looking for a perfect product or are overly concerned about condition.