catsonic premium window alarm device set - extra loud 130db alarm & vibration sensors - universal compatibility & easy installation - great for home, office & rv security (6 set black) catsonic <b>this product is the real solution for every home that’s still without any burglar protection! </b> <br> <br> <b>frequently asked questions - catsonic window alarm device</b> <br> <br> <br> <b>question:</b> does the sensor also work on my door and sliding window? <br> <b>answer: special design!</b> our catsonic alarm is not designed to work with doors or with all sliding windows as our alarm uses an advanced vibration sensor specifically to detect when glass breaks or a window is opened by force. for doors and sliding windows which can be opened easy and without force we recommend to use a different category of alarms with a magnet sensor as we can not guarantee that an alarm will be triggered on allsliding windows. <br> <br> <b>question:</b> will the alarm be loud enough to be heard by my family or the neighbors? <br> <b>answer: proven protection system!</b>the device has one of the loudest alarm sirens on the market right now! our special design allows it to warn you and your family properly. it’s always hard to tell whether your neighbors are going to react to such a situation. first and fore most our window alarm is used as the first line of defense and should not replace or compete with an expensive home alarm system. <br> <br> <b>question:</b> what batteries do i need to buy in order to use the sensors? <br> <b>answer: up to 1 year of energy!</b> are you tired of looking for the right batteries yourself? no problem, our alarm system comes with 3 pre-installed lr 44 batteries for each alarm which means that you will not need to buy any batteries for the next 9-12 months at least! please make sure you pulled out the clear transparent film in the battery compartment which protects the batteries during transport so that the batteries are activated! <br> <br> <b>we have limited supply of this bestselling product. grab yours today from amazon.com exclusively.</b>