Window Alarm System 4-Pack - Ultra-Loud 120Db Alarms With Advanced Vibration Product Details Plastic Specialized Window Alarm System: This window alarm is specifically designed to offer security to glass windows in your home, garage, office, RV, or dormitory, including both sliding and traditional windows. Advanced Glass Vibration Sensor: The product comes with a built-in vibration sensor and provides high/low sensitivity settings, reducing the chances of false alarms. Powerful 120 dB Alarm: Upon detecting vibration, the window security alarms emit a loud 120 decibel alarm that lasts for 60 seconds. Visible Warning Sign: The glass door alarm includes a red LED light that flashes every 4 seconds, serving as a potent deterrent to potential intruders. Additional warning stickers enhance the preventative aspect of the security system. Low Battery Indicator: The red LED light also serves as a low battery indicator. When the battery runs low, it will flash rapidly, signaling that a battery replacement is needed. Powered by AAA Batteries: This window security sensor requires two AAA batteries (not included). Its wireless, easy-to-install design allows for a peel-and-stick application on any window or glass. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.