This set of two Radio Shack FM Wireless Intercoms, model 43-493, is perfect for indoor communication. With wireless connectivity and a plug-in feature, these intercoms make it easy to stay in touch with others in different rooms or areas of your home or business. The intercoms have a range of up to 150 feet and require no batteries. This set of intercoms is ideal for anyone looking to improve their home security or communication within their place of business.