Cyrillic Capital Letter A With Breve
HTML Entity Browser Test:

U+04D0 is the Unicode hex value of the character Cyrillic Capital Letter A With Breve, which is categorized as "uppercase letter" in the Unicode 6.0 character table.

In addition, U+04D0 is a composite character comprising of one or more other Unicode characters modified or combined.

Unicode Character Information
Unicode Hex U+04D0
General Category Uppercase Letter [Code: Lu]
Canonical Combining Class 0
Bidirectional Category L
Decomposition Mapping 0410 0306
Mirrored N
Lowercase Version U+04D1
Unicode Character Encodings
Cyrillic Capital Letter A With Breve HTML Entity Ӑ (decimal entity), Ӑ (hex entity)
Windows Key Code Alt 1232 or Alt +04D01
Programming Source Code Encodings Python hex: u"\u04D0", Hex for C++ and Java: "\u04D0"
UTF-8 Hexadecimal Encoding 0xD390
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 1232) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +04D0) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Cyrillic Capital Letter A With Breve character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.