It's for the MantisX sensor - its an accelerometer that records your movements before, during and after a shot.
Gives feedback about what you are doing wrong. Makes dry fire much more productive.
The Mantis X10 is the next revolution of the breakthrough MantisX. The X10 mounts to standard slotted accessory rails (Do you need an adapter?). The X10 is part of the second generation of Mantis Shooting Performance Systems. The key features of the second generation hardware include: 40%...