Open box, used. This item is untested but I offer refunds if you experience any problem. The "Milton's Bells Long-Range Wireless Transmitter" is a reliable and efficient device designed by MiltonsBells specifically for alarm systems. This transmitter allows for seamless wireless connectivity, making it easy to establish a secure and efficient home security system. With its long-range capabilities, users can confidently protect their home and garden without worrying about barriers or limited signal strength. Perfect for home improvement projects focused on enhancing security measures, this transmitter is a valuable addition to any home's safety infrastructure.