Update README.md

Author: Lowaichung

README.md

@@ -1,8 +1,6 @@
 CAN BUS Shield
 ---------------------------------------------------------
-[![CAN BUS Shield](https://github.com/SeeedDocument/CAN_BUS_Shield/blob/master/image/Can_bus_shield_all.jpg?raw=true)](http://www.seeedstudio.com/depot/CANBUS-Shield-p-2256.html?cPath=19_88)
-
-
+[![CAN BUS Shield](https://statics3.seeedstudio.com/seeed/file/2017-08/bazaar528529_img_2653a.jpg)](https://www.seeedstudio.com/CAN-BUS-Shield-V2-p-2921.html)
 
 <br>
 
@@ -15,6 +13,10 @@ CAN-BUS is a common industrial bus because of its long travel distance, medium c
 - Industrial standard 9 pin sub-D connector
 - Two LED indicators
 
+## Alternative Choice
+If your project is space limited, here is a [Serial CAN-BUS module](https://www.seeedstudio.com/Serial-CAN-BUS-Module-based-on-MCP2551-and-MCP2515-p-2924.html) which has the full features of CAN Bus. The Serial CAN-BUS provides your Arduino or others MCU with the capability to communication to CAN Bus, such as hacking your vehicle. This Grove CAN-BUS module is controled by UART, that means if your MCU has a UART interface, this serial CAN BUS is available. Good news is that this Serial CAN BUS module needs only $14.9
+
+[![](https://www.seeedstudio.com/upload/image/20170826/1503688824337934.jpg)](https://www.seeedstudio.com/Serial-CAN-BUS-Module-based-on-MCP2551-and-MCP2515-p-2924.html)
 
 
 ## Installation: