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Q1:Do you have CE or any other certification? A:Yes,we CE, , ROHS and FCC certification,etc. Q2:Can you give me a discount? A:Please discuss with our sales. Q3:How about gain and output power of your device? A:Different models, gain and output power are different,for more details, please contact us. Q4:How long is warranty period? A:The warranty is 12 months. And we offer 7*24 technical support Q5:how many square meters can be covered? A:For different models, the covered square meters are different. Q6:Can I use your device in suburbs or remote areas? Yes, as long as you can find a good signal source, our signal booster can help you solve signal problems in remote areas. Q7:How about gain and output power of your device? Different models, gain and output power are different,for more details, please contact us.