diff --git a/RaspberryPi/Python/example/DFRobot_AS3935_detailed.py b/RaspberryPi/Python/example/DFRobot_AS3935_detailed.py
index b9cf0ff..5f00d73 100644
--- a/RaspberryPi/Python/example/DFRobot_AS3935_detailed.py
+++ b/RaspberryPi/Python/example/DFRobot_AS3935_detailed.py
@@ -59,7 +59,7 @@ sensor.disturberEn()
 # Connect the IRQ and GND pin to the oscilloscope.
 # uncomment the following sentences to fine tune the antenna for better performance.
 # This will dispaly the antenna's resonance frequency/16 on IRQ pin (The resonance frequency will be divided by 16 on this pin)
-# Tuning AS3935_CAPACITANCE to make the frequency within 500/16 kHz ± 3.5%
+# Tuning AS3935_CAPACITANCE to make the frequency within 500/16 kHz plus 3.5% to 500/16 kHz minus 3.5%
 #
 # sensor.setLcoFdiv(0)
 # sensor.setIrqOutputSource(3)
diff --git a/RaspberryPi/Python/example/DFRobot_AS3935_ordinary.py b/RaspberryPi/Python/example/DFRobot_AS3935_ordinary.py
index e36e186..628ef22 100644
--- a/RaspberryPi/Python/example/DFRobot_AS3935_ordinary.py
+++ b/RaspberryPi/Python/example/DFRobot_AS3935_ordinary.py
@@ -51,7 +51,7 @@ sensor.manualCal(AS3935_CAPACITANCE, AS3935_MODE, AS3935_DIST)
 # Connect the IRQ and GND pin to the oscilloscope.
 # uncomment the following sentences to fine tune the antenna for better performance.
 # This will dispaly the antenna's resonance frequency/16 on IRQ pin (The resonance frequency will be divided by 16 on this pin)
-# Tuning AS3935_CAPACITANCE to make the frequency within 500/16 kHz ± 3.5%
+# Tuning AS3935_CAPACITANCE to make the frequency within 500/16 kHz plus 3.5% to 500/16 kHz minus 3.5%
 #
 # sensor.setLcoFdiv(0)
 # sensor.setIrqOutputSource(3)