2N Indoor Flush Box. The Indoor Flush Box installation box is suitable for the 2N indoor intercom. It allows for drilling holes with a drill and adjusting a horizontal position after installation. A spirit level can be attached for easy checking. The box is compatible with the 2N Indoor Talk and 2N Indoor Compact. Simply secure with 2N. 2N is a leading European company in the development and manufacturing of information and communication technology as well as security products. The company is a global market leader in the field of IP intercom systems. All products meet strict international standards and are compatible with third-party systems. The 2N product lines include, among others, IP intercoms for door communication and emergency calls, as well as IP audio systems designed to make life easier and safer. In 2016, 2N was acquired by the Axis Group.