SONY RM-50 Wired Remote Control Unit and SONY RM-65 Wired Synchro Remote Control Unit.

Compatible Models as far as I know are (please do your own research): TC-K88B, TC-K88, TC-K80II, TC-K81, TC-K75, TC-K555, TC-K71, TC-K61, TC-FX1010, TC-K80, TC-K77R, TC-K65, TC-K55, TC-FX6, TC-FX7, TC-FX600, TC-FX66, TC-K777, TC-V7, TC-YX7.

Tested on TC-K555, both units are working.