Unlike the cheaper charger kits made from plastic this little charger kit is made from machined anodised aluminium. 
The Premium Regulated Charger is very compact but is just large enough to house a very small regulator. No need to worry about pressing the trigger on the charger too much or too little, just use the regulator to set the pressure and forget. 
Simply screw on the MFL threaded disconnect, attach to your keg, and set the dispense pressure. 
Note: The Premium Regulator CO2 Charger does not come with CO2 16g cartridge you will need to purchase these separately. Does not include grey/gas disconnect