It says 'Power Unit', which is not a power supply unit. It is a bit confusing, It is not just a simple 14.4V 3.3A PSU.Just to clarify It's not a charger on it's label it says "Power Supply"
It is UL listed which is about the best safety certification you can have. They would insist in differentiation between a standard PSU and a intelligent charger unit, so they have called it a 'Power Unit (For LiFePO4n Battery)'. It also carries a further 'Caution: For use with 4S LiFePO4 Battery Pack only'. It will have a specialised connector, either unique to the manufacturers battery pack or a generic connector for that style of battery pack.
I am not sure why they wouldn't call it a 'Battery Charger for LiFePO4 Battery' , but it is more than just a simple battery charger, it's a 4 stage charge unit, so perhaps to reduce the possibility of confusion.
Edit: I see there is a Barrel connector option from some manufacturers, so not necessarily a special connector.