2X DC 6V 9V 12V 24V Flip Flop Latch Relay Module Bistable Self locking Switch Low pulse trigger Board for Arduino Smart home LED|Relays| - AliExpress
10pcs 5V 6V 9V 12V 24V Flip Flop Latch Relay Module Bistable Self locking Switch Board for Arduino UNO pump door lock dc motor|Relays| - AliExpress
Flip Flop Multivibrator Relay using pair of Transistors
Bistable Flip Flop Latch Switch Circuit Module Button Trigger Power off Memory Single button Switch dc 3V 18V 12v|Replacement Parts & Accessories| - AliExpress