diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@
 
 English | [简体中文](./README.zh-CN.md)
 
+Purchase link: https://www.amazon.com/dp/B07R7Z2334
+
 ## Why We Make PiSugar
 
 In the last few months, we have been working on projects base on Pi zero. It always comes to my mind that why we choose this tiny thing, to build a new portable product.
@@ -41,9 +43,8 @@ With iron sheets inside, you can place your pi zero anywhere with magnet.
 
 |  | PiSugar PowerPack M | PiSugar PowerPack L | 
 | - | :-: | :-: | 
-| Output Voltage | 5V | 5V | 
-| Current Capacity | 1.2A | 2.4A | 
-| Battery Power | 900mAh | 1200mAh |
+| Output Current | 1.2A | 2.4A | 
+| Battery Capacity | 900mAh | 1200mAh |
 | Battery Life | 3 ~ 4 Hour | 5 ~ 6 Hour |
 | USB Charging Port | mircoUSB | mircoUSB |
 | Size (board) | 65x30x1.5 mm | 65x30x1.5 mm |
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