This vintage Safe House digital key switch, model 49-535a, is a rare find for those looking to disarm or arm most alarm systems. Made in Taiwan, this switch is compatible with various alarm systems and comes with an alarm for added security. It is perfect for those who want to take control of their home surveillance and smart home electronics. With its brand name and high-quality construction, this digital key switch is a must-have for anyone who wants to ensure their safety. It comes with all the necessary items included, including the alarm, and is easy to use. Whether you're looking to disarm your alarm system or arm it, this switch is the perfect solution. Get your hands on this rare find today!