USA-BASED WITH EXPERIENCE: Dakota Alert is a South Dakota-based company with over 30 years of experience in the wireless driveway alarm industry. We ensure top quality and customer satisfaction with all of our products. FOUR VOLUME LEVELS: The RE-4k Plus has four different volume levels to choose from, so you can find the right sound level for your specific application. The RE-4k Plus has 16 different tunes from which to choose. Whether you need a loud, attention-grabbing alarm or a more subtle notification, the RE-4k Plus has you covered. CUSTOMIZABLE OUTPUT DURATION: Select your preferred output duration for either 1, 5, 15 seconds, or 5 minutes, giving you the flexibility to choose the duration that works best for your specific needs. RELAY AND 12V DC OUTPUTS: The Dakota Alert RE-4k Plus will give a relay and/or 12V DC output when a signal is received. The two Form "C" relays can be connected to an alarm control or home automation panel (not included) to act as a hardwired zone for the panel. The 12V DC output can be used to power a bell, siren, strobe, or any other 12V DC device (not included). The output duration can be set for 1, 5, 15 seconds or 5 minutes. SIMPLE CODE-LEARNING TECHNOLOGY FOR EASY INSTALLATION: The RE-4k Plus receiver has simple code-learning technology that makes installation a breeze. Up to 16 sensors can be paired with one receiver, or an unlimited number of receivers can be paired to one sensor. This means you can have this system set up in minutes and start protecting your home or business right away.