Cyrillic Capital Letter Tsse
HTML Entity Browser Test:

U+A690 is the Unicode hex value of the character Cyrillic Capital Letter Tsse, which is categorized as "uppercase letter" in the Unicode 6.0 character table.

Unicode Character Information
Unicode Hex U+A690
General Category Uppercase Letter [Code: Lu]
Canonical Combining Class 0
Bidirectional Category L
Mirrored N
Lowercase Version U+A691
Unicode Character Encodings
Cyrillic Capital Letter Tsse HTML Entity Ꚑ (decimal entity), Ꚑ (hex entity)
Windows Key Code Alt 42640 or Alt +A6901
Programming Source Code Encodings Python hex: u"\uA690", Hex for C++ and Java: "\uA690"
UTF-8 Hexadecimal Encoding 0xEA9A90
1 To type a Unicode symbol in Windows, hold down the ALT key and enter the decimal or hexadecimal code provided using the numeric keypad. The decimal alt code (Alt 42640) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +A690) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Cyrillic Capital Letter Tsse character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.