This is the F18 Lock Shoot Indicator and AOA Indicator, specifically the F/A-18C Lot 20 model from DCS.
Video showcasing the unit is here
Great for pit builders, these units REQUIRES the ECM Controller to function, it will not be functional by itself.
The unit is designed so the Lock Shoot is connected to the ECM Control board and the AOA then connects to the Lock shoot.
This F18 Lock Shoot Indicator and AOA would be a great addition to a Fighter Sim cockpit you are building, and perfect for any Flight sim Enthusiast / DCS gamer.