Hello Luis,
Everything country has its own RF transmission regulation which is monitored and supervised by organisation like FCC in the US. As you have bought a product something which is defined for the the US and it "MAY" overshoot the limits defined in Guatemala. this is why it is always advised to buy in the local country as they will comply to local RF laws and regulations. I am not sure what are the regulations in your country so best piece of advice is to ask a Ruckus sales staff in Guatemala region to see if your already bought 901-7982-US00 is good for Guatemala or not.
Hope this helps.