I'm trying to get wireless coverage to my garage and this device can do it, but...  5ghz is -70 dbi or worse and best I can get for 2.4 is -62.  Not horrible, but I'm having trouble understanding how to improve it.  The device puts out 700 mW.  To each antenna or total?  What is their dbi?  I replaced one antenna with a 10 dbi dual band directional antenna and another with a 9 dbi 2.4 ghz antenna to get the numbers mentioned (-70 & -62).  I'm stuck.  Some websites suggest that dual band is better even though the 2.4 is reaching the garage.  Should I swap all 3 stock antenna with 3 dual band antenna? Single band?  Directional or omni?  5 dbi, 9, 12?  I just need to bump my numbers a little and I'm getting confused.  I'm not good with the whole mW, dbi, dbm and how they work together or against each other.