add new Product Watch , AC socket and change BeetleC some description

docs/en/1515/ap.md

@@ -26,5 +26,6 @@ As more advanced,  together with the  Aluminium-Profile accessories (connectors,
 - Length
   -  1000mm
   -  500mm
-  -  300mm
+  -  200mm
   -  100mm
+  -  50mm

docs/en/accessory/watch.md

@@ -0,0 +1,57 @@
+# Watch {docsify-ignore-all}
+
+<img src="assets\img\product_pics\accessory\watch\watch_01.jpg" width="30%" height="30%"> <img src="assets\img\product_pics\accessory\watch\watch_02.jpg" width="30%" height="30%">
+***
+
+## Description
+
+**Watch** is an M5Core watch set. In addition to being a powerful development hardware, the M5Core has a sophisticated look that gives it the possibility to wear smart. The kit is designed for the M5Core series, in addition to the cool strap. Also equipped with a 700mAh lithium battery, allowing users to have sufficient reliable endurance while using the device.
+
+
+<img src="assets\img\product_pics\accessory\watch\watch_03.jpg" width="30%" height="30%">
+
+
+## Product Features
+
+- 700mAh lithium battery
+
+## Weight and Size
+
+- Item size:
+     Base: 54.3mm x 54.3mm x 7mm
+     Strap: 260mm x 22mm (total length after assembly)
+- Item weight:
+     Base: 25g
+     Strap: 18g
+- Product size: 127mm x 69mm x 23mm
+- Product weight: 87g
+
+## Package Includes
+
+- 1x strap base
+- 1x 700mAh battery
+- 2x telescopic card pin
+- 2x M3x15 screws
+- 1x hex wrench
+- 1x disassemble screwdriver
+
+
+## Application
+
+- smart watch
+
+
+
+## Assembly step
+
+>Assembling the strap: Insert the matching telescopic card into the strap fixing hole, and have two small holes on both sides of the base of the watch. Place one side of the telescopic card pin into the hole and the other side with the finger. Press and place it. Complete the installation of another strap in the same way.
+
+<img src="assets\img\product_pics\accessory\watch\watch_04.jpg" width="80%">
+
+>Install the battery: Plug the lead wire from the battery to the corresponding interface on the host circuit board. After the plug-in is completed, adjust the position of the battery to facilitate the installation of the watch base.
+
+<img src="assets\img\product_pics\accessory\watch\watch_05.jpg" width="80%">
+
+>Installation base: According to the position of the BUS bus on the main unit, the watch base is vertically inserted into the main unit and locked with the matching screws to complete the assembly.
+
+<img src="assets\img\product_pics\accessory\watch\watch_06.jpg" width="80%">

docs/en/app/ac_socket.md

@@ -0,0 +1,54 @@
+# AC Socket {docsify-ignore-all}
+
+<img src="assets\img\product_pics\app\ac_socket\ac_socket_01.jpg" width="30%" height="30%"> <img src="assets\img\product_pics\app\ac_socket\ac_socket_02.jpg" width="30%" height="30%"> <img src="assets\img\product_pics\app\ac_socket\ac_socket_03.jpg" width="30%" height="30%">
+
+## Description
+
+This is an upgrade of a normal AC socket outlet, which empowers the user to customize the AC outlet through RS485 series. Serial communication control can include multiple AC sockets, have them serial connected in the same RS485 main bus, can be applied to a typical industrial application scenario. 
+Let's break it down a little bit, start with the bottom part. 
+- The whole AC socket is consist of two parts. For people who are familiar with M5 industrial product series,  would recognize the base at the bottom is BASE26. we put a 3pin inlet socket at one customizable side of BASE26. This is where we power the AC socket from. 
+<br>
+
+<img src="assets\img\product_pics\app\ac_socket\p01.jpg" width="30%" height="30%">
+
+
+- The top is where goes in the AC plug, and the relay control inside would switch on and off the power in here. 
+
+<img src="assets\img\product_pics\app\ac_socket\p02.jpg" width="30%" height="30%">
+
+- To get more AC socket connected in series, we would use an HT3.96 terminal connectors, as you can see the orange socket in the picture. 
+
+<br>
+
+<img src="assets\img\product_pics\app\ac_socket\p03.jpg" width="30%" height="30%">
+
+- The bottom part is mainly in charge of converting the AC power 220V to DC 5V to power the microprocessor STM32F030F4 and  RS485 related circult. As you can see from the picture, two parts wire connected by M-Bus socket and a pair of power wire.  A red led indication is placed on top.
+
+<img src="assets\img\product_pics\app\ac_socket\p04.jpg" width="30%" height="30%">
+
+
+## Product Features
+- RS485 AC OUTLET
+- support Mutiple device Series connection 
+- STM32030F4
+- Embedded 4x M3 Nut
+- Build with BASE26
+- INPUT : 100-240V
+- OUTPUT: 10A
+- Power Status indicator
+
+
+## Weight and Size
+
+- Product size:54mm x 54mm x 61mm
+- Product weight:130g
+
+
+## Include
+
+- 1x AC Socket
+
+
+## Application
+
+-  Smart AC Socket Outlet With wire control of RS485