diff --git a/Usage-cautions.md b/Usage-cautions.md
index 6c7ea15..23870e0 100644
--- a/Usage-cautions.md
+++ b/Usage-cautions.md
@@ -1,13 +1,15 @@
-The LNA of HackRF is extremely sensitive, thus you need to notice the following things:
-# SMA port
-- DO NOT change/ swap/ take off/ put on antennas while power is on IN ANY CASE.
-- If you use an antenna that expose the literal metal part (for example a telescopic antenna), DO NOT physically touch the antenna with you hands/ body/ or any physical things that is conductive, since the static elec is dangerous to LNA. (It's not like it's definitely would damage it, but a thing that you may should prevent. Antennas which have plastic protection however won't be influenced.)
+The LNA of HackRF is sensitive and can get damaged
 
-# Monitoring range
-- The LNA of hackrf is physically between SMA port and radio front end
-- Thus, you shouldn't receive near high power transmitters, even if it's not in the range that you are monitoring.
-- For example: You are receiving FM radio at 100.00MHz, and there's a high power transmitter at 2.5GHz around you, the transmitter will still blow your LNA, if you set LNA/AMP too high and/or too near the transmitters,  even if 2.5GHz is not in the freq range that you are monitoring.
+# Prevention
+## SMA port
+- DO NOT swap the antenna while power is on.
+- If you use an antenna that expose a metal part, DO NOT touch the antenna with you hands/body (static electricity can damage the LNA)
 
-# I suspect I damaged the LNA, how do i check?
+## Monitoring range
+- You shouldn't receive near high power transmitters, even if it's not in the range that you are monitoring
+
+# Diagnostic
 - Try listen local radio. Try with AMP on and off both. 
-- Try capture and replay a **non**-rolling-code <sub>(to prevent break the rolling sync)</sub> fob (radio remote <sub>not IR remote which is more common</sub>). Try with AMP on and off both. 
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+- Try capture and replay a **non**-rolling-code <sub>(to prevent break the rolling sync)</sub> fob (radio remote <sub>not IR remote which is more common</sub>). Try with AMP on and off both. 
+
+# Repair
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