Sinden Lightgun With Recoil - 2 Pack Color:Red - Red In the box is also

In the box is also included a USB cable so the pedal can be modified to support USB instead and be exactly the same as a normal Sinden Arcade Foot Pedal

which we will call generation 1 and 2

then it could be the USB cable or the PCB

A good example of this

if the lightgun is the only lightgun connected

Sinden Lightgun With Recoil - 2 Pack Color:Red - Red In the box is alsoThe Sinden Lightgun is the world's only true LCD television compatible Lightgun in that it works directly off of the television light and doesn't require any other hardware such as sensor bars. It does not require constant re calibration and remains perfectly accurate even if you change position or angle. This is the recoil model which contains a chunky solenoid to give a great recoil feedback when playing. The recoil model has an innovative circuit