diff --git a/Sonoff-S20-Smart-Socket.md b/Sonoff-S20-Smart-Socket.md
index ab18bb89..9a425616 100644
--- a/Sonoff-S20-Smart-Socket.md
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@@ -5,6 +5,15 @@
Please see the [Hardware Preparation](https://github.com/arendst/Sonoff-Tasmota/wiki/Hardware-Preparation) page for general instructions.
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+The picture shows how to program the S20 Smart Socket powered by the FTDI USB converter. With newer US sockets, either use a right-angle header, or remove the header after flashing. Otherwise, the pushbutton may rub against a pin and get stuck.
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### Step 1.
Be sure it is **NOT** plugged in!