All modules available in MSTS system are using the same standard casing which is water and dust resistant. Current class is not lover that IP44, but they are under further tests.
Rotating module
Depends on the picture on each of the sides – you should shoot or not.
Application internal icon 
Dimensions (LxWxH): 30cm x 20cm x 21 (with holder, 12cm without). Weight – 4kg
Pyrotechnic module
It can initialize smoke flare or other types of fireworks. There are 2 wires which can be used to initialize two separated pyrotechnic packages.
Application internal icon 
Dimensions (LxWxH): 30cm x 20cm x 10cm. Weight – 2.8kg
Popper module
Popper module allows you for fast popping and disappearing of the target. Full cycle (show and hide) can be as fast as 1 second – same as with rotating target. By default it has power saving mode to ensure your training can last longer.
Dimensions without holder (LxWxH): 30cm x 24cm x 10cm.
Hit detector
Hit detector is a small module which allows you to detect hits on hardox targets but also on cardboard (like IPSC targets). It can detect up to 10 hits per second.
Weight is about 150g. Dimensions 9cm x 7.5cm x 5cm.
Sample premium package of modules can look like below
More types of modules are in preparation including sound, light modules and not only.
Also in near future modules will have extensions to make the training even more interesting, challenging and fun.