View Single Post
  #24  
Old 07-04-2015, 06:13 AM
iam_7up_gamer iam_7up_gamer is offline
Member
 
Join Date: Jun 2011
Location: kourosh land
Posts: 91
Default

Medium frequency like 40 - 70 khz is exact but not have very amplitude , but high frequency is inverse. This is first term for long distance detect.
Reply With Quote