Solid left-pointing triangle, a back or reverse play button used in media controls and as a left arrow.
U+23F3HOURGLASS WITH FLOWING SANDU+23F5BLACK MEDIUM RIGHT-POINTING TRIANGLEU+23F2TIMER CLOCKU+23F6BLACK MEDIUM UP-POINTING TRIANGLEU+23F1STOPWATCHU+23F7BLACK MEDIUM DOWN-POINTING TRIANGLEU+23F0ALARM CLOCKU+23F8DOUBLE VERTICAL BARU+23EFBLACK RIGHT-POINTING TRIANGLE WITH DOUBLE VERTICAL BARU+23F9BLACK SQUARE FOR STOPU+23EEBLACK LEFT-POINTING DOUBLE TRIANGLE WITH VERTICAL BARU+23FABLACK CIRCLE FOR RECORD256 characters in the Miscellaneous Technical Unicode block, from number 245.
U+23F4BLACK MEDIUM LEFT-POINTING TRIANGLEU+23F5BLACK MEDIUM RIGHT-POINTING TRIANGLEU+23F6BLACK MEDIUM UP-POINTING TRIANGLEU+23F7BLACK MEDIUM DOWN-POINTING TRIANGLEU+23F8DOUBLE VERTICAL BARU+23F9BLACK SQUARE FOR STOPU+23FABLACK CIRCLE FOR RECORDU+23FBPOWER SYMBOLU+23FCPOWER ON-OFF SYMBOLU+23FDPOWER ON SYMBOLU+23FEPOWER SLEEP SYMBOLU+23FFOBSERVER EYE SYMBOL