Ultimarc AimTrak Light Gun Manual page 9

Section 6: Fitting Upgrade Kit
Note this kit does not support recoil and we do not recommend fitting it to
a recoil-equipped unit.
USB and Bluetooth devices can be used together on one host but the
Aimtrak software utility will not function with both connected.
Kit contents:
Replacement sensor module
Charging cable
Charging board
Battery
Heat-resistant silicone foam
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