The Unicode character U+3391, displayed as ㎑ and named "Square Khz" is located in the CJK Compatibility block. This character was introduced in Unicode version 1.1 (1993). Find its HTML entities, UTF-8/UTF-16 encodings, hex values, and copy-paste details below.
㎑㎑U+3391;13201\003391\u3391\x{3391}\u{3391}u'\u3391'E38E91339100003391