diff --git a/docs/en/atom/atomhub_switch.md b/docs/en/atom/atomhub_switch.md
index 8d615ccc..055f0f7a 100644
--- a/docs/en/atom/atomhub_switch.md
+++ b/docs/en/atom/atomhub_switch.md
@@ -6,17 +6,16 @@
 
 ## Description
 
-**ATOM SWITCH** is a bi-directional control programable switch for the M5ATOM. It can be connected to bi-directional AC / DC circuits for simultaneous on-off control. The on-board relay can support up to 250V / 16A AC or 5V / 1A DC output. Built in step-down module can provide 5V / 1A DC power supply. In order to ensure safe use, its DC circuit has a built-in self recovery fuse (250V / 1A), which can effectively disconnect the circuit in case of over current or short circuit. In order to facilitate the use of users in industrial scenarios, an SP485EE level-conversion IC is built in. There are also a set of RS485 interfaces provided for the user to connect RS485 equipment. In addition, a set of PH2.0 interfaces is also provided for connecting I2C peripheral equipment or general I/O equipment. With the Bluetooth and WiFi functions of M5ATOM, you can easily setup a remote control switch. If you have multiple M5ATOM HUB SWITCH modules, you can set them up in parallel through the RS485 interface.
-
+**ATOM SWITCH** is a bi-directional control programable switch for the M5ATOM. It can be connected to bi-directional AC circuits for simultaneous on-off control. The on-board relay can support up to 250V / 10A AC(Instantaneous current). Built in step-down module can provide 5V / 1A DC power supply for ATOM. In order to ensure safe use, its DC circuit has overheating and short circuit protection functions. In order to facilitate the use of users in industrial scenarios, an SP485EE level-conversion IC is built in. There are also a set of RS485 interfaces provided for the user to connect RS485 equipment.RS485 has the ability to supply power to ATOM, the support voltage is 9-24V. In addition, a set of PH2.0 interfaces is also provided for connecting I2C peripheral equipment or general I/O equipment. With the Bluetooth and WiFi functions of M5ATOM, you can easily setup a remote control switch. If you have multiple M5ATOM HUB SWITCH modules, you can set them up in parallel through the RS485 interface.
 
 ## Product Features
 
 - Compatible ATOM Matrix/ATOM Lite
-- AC/DC input
+- Built-in AC-DC circuit
 - 2-way relay
 - Built-in RS485 level-conversion, supporting Modbus
 - PH2.0 port extend
-- Self recovery fuse protection
+- Short circuit protection
 - Remote control via Bluetooth, WiFi and RS485
 
 ## Include
@@ -48,8 +47,12 @@
       <td>AC 250V/16A, DC 5V/1A</td>
    </tr>
    <tr>
-      <td>Input power</td>
-      <td>AC 250V, DC 5V</td>
+      <td>Switch power supply(AC-DC)</td>
+      <td>AC 250V-DC 5V</td>
+   </tr>
+   <tr>
+      <td>RS485 supply voltage</td>
+      <td>9V-24V</td>
    </tr>
    <tr>
       <td>Interface</td>