diff --git a/README.md b/README.md
index c3cfd03..b913a30 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,24 @@
-# Zintercom
-# Zigbee Intercom Automator
+# Zintercom  
+## Zigbee Intercom Automator
+
+### PCB size  
+  
+`57.5mm x 27.3mm`  
+<img src="./images/dimensions.png" width="60%">
+
+
+### DC Power  
+  
+Support `router` and `end device` modes.  
+Install `E18-MS1PA1`, `E18-MS1PA2` or `E18-MS1-PCB`.  
+<img src="./images/front_side.png" width="70%">
+<img src="./images/back_DC_5-9V.png" width="35%">
+<img src="./images/back_microUSB.png" width="35%">
+
+
+### Battery Power  
+  
+Support only `end device` mode.  
+Install `E18-MS1-PCB` only!  
+<img src="./images/back_2xAAA.png" width="35%">
+<img src="./images/back_CR2032.png" width="35%">