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                       Q3. How many channels can be used simultaneously in one place? | 
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                       Soolai’s systems adopted high performance double-IF circuit and  multiple filters to get high anti-interference. | 
                      
                     
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                       It could use 3-4 channels simultaneously when using the  bandwidth which is 2MHz, just like 863~865MHz.  | 
                      
                     
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                       It could use more than 20 channels when using the bandwidth  which is more than 20MHz, just like 846~870MHz. | 
                                          
                                      
                                   
                
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