2N Blind Cap for Single Button, Black. This blind cap is compatible with 2N IP Verso and 2N LTE Verso and is designed to cover unused buttons. 2N is a leading European company in the development and manufacturing of information and communication technology as well as security products. It 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 range includes, among other things, 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.