diff --git a/docs/assets/img/product_pics/unit/unit-v/unit-v-08.jpg b/docs/assets/img/product_pics/unit/unit-v/unit-v-08.jpg
new file mode 100644
index 00000000..31247b40
Binary files /dev/null and b/docs/assets/img/product_pics/unit/unit-v/unit-v-08.jpg differ
diff --git a/docs/en/hat/hat-8servos.md b/docs/en/hat/hat-8servos.md
index 8cae72c6..43b388e7 100755
--- a/docs/en/hat/hat-8servos.md
+++ b/docs/en/hat/hat-8servos.md
@@ -36,7 +36,7 @@
## Package Includes
- 1x 8Servos-HAT
-- 1x 16340 battery
+- 1x 16340 battery(750mAh)
## EasyLoader
diff --git a/docs/en/hat/hat-bugc.md b/docs/en/hat/hat-bugc.md
index d26fa732..c45136d4 100644
--- a/docs/en/hat/hat-bugc.md
+++ b/docs/en/hat/hat-bugc.md
@@ -56,7 +56,7 @@ The Bugc base needs to be used in conjunction with the M5StickC controller. The
## Package Includes
- 1x BugC base
-- 1x 16340 Battery
+- 1x 16340 Battery(750mAh)
## Code
diff --git a/docs/en/hat/hat-joyc.md b/docs/en/hat/hat-joyc.md
index 8dfd45f5..09fcb146 100644
--- a/docs/en/hat/hat-joyc.md
+++ b/docs/en/hat/hat-joyc.md
@@ -19,7 +19,7 @@
## Weight & Dimension
- Dimension:200mm x 55mm x 50mm
-- Weight:81g(include Battery)
+- Weight:81g(include 750mAh Battery)
## Package Includes
diff --git a/docs/en/hat/hat-powerc.md b/docs/en/hat/hat-powerc.md
index 8c73595b..b614d6e7 100644
--- a/docs/en/hat/hat-powerc.md
+++ b/docs/en/hat/hat-powerc.md
@@ -28,7 +28,7 @@
## Include
-- 1x PowerC HAT(include battery x 2)
+- 1x PowerC HAT(include battery 2 * 750mAh)
## Communication protocol
diff --git a/docs/en/hat/hat-puppyc.md b/docs/en/hat/hat-puppyc.md
index afe9ab7c..e295cfda 100644
--- a/docs/en/hat/hat-puppyc.md
+++ b/docs/en/hat/hat-puppyc.md
@@ -41,7 +41,7 @@ It walks slowly and is easy to control.Due to the small contact area, the moveme
## Package Includes
- 1x PuppyC base
-- 1x 16340 Battery
+- 1x 16340 Battery(750mAh)
- 4x SG90 Servo
## EasyLoader
diff --git a/docs/en/hat/hat-roverc.md b/docs/en/hat/hat-roverc.md
index ebf5e727..ac3a23e4 100644
--- a/docs/en/hat/hat-roverc.md
+++ b/docs/en/hat/hat-roverc.md
@@ -50,7 +50,7 @@ Two M5StickCs will be burned into the EasyLoader firmware of JoyC and RoverC res
## Package Includes
-- 1x RoverC base(includes Battery)
+- 1x RoverC base(includes 750mAh Battery)
## EasyLoader
diff --git a/docs/en/module/nb-iot_plus.md b/docs/en/module/nb-iot_plus.md
new file mode 100644
index 00000000..695710fe
--- /dev/null
+++ b/docs/en/module/nb-iot_plus.md
@@ -0,0 +1,187 @@
+# Module NB-IoT PLUS{docsify-ignore-all}
+
+
+
+
+***
+
+:memo:**[Description](#Description)** :electric_plug:**[Schematic](#Schematic)** :octocat:**[Code](#Code)** **[EasyLoader](#EasyLoader)** 🛒**[Purchase](https://m5stack.com/collections/m5-module/products/m5stack-nb-iot-plus-module)**
+
+## Description
+
+This is a wireless communication module, integrated an **NB-IoT** M5311 module that produced by China Mobile. The dimension if M5311 is 16mm * 18mm * 2.2mm, which is very tiny, and gives convenience to the user of more flexible dimension requirement.
+
+package with LCC allows quick production through standard SMT, which provides a more reliable connection method and performance on the extreme environment.
+
+the power requirement of this M5311 module is down to 2.1V, AA battery supported, it can fully utilize the power of AA battery, to provide an extremely low-power-consumption solution for terminal devices.
+
+M5311 provides abundant external interfaces and protocol stacks, support peripheral sensors, etc.
+
+Based on M5311, we have offered extra hardware resources on NB-IoT Module, WUP, STA LEDs, 3 alternative UARTs, one power button, and 2 alternative antennae.
+
+
+Power Operation:
+- Power On: GPIO2 stay HIGH for 2s
+- Power Off: GPIO2 stay HIGH for 8s
+- Power On: Button long-press for 2s
+- Power Off: Button long-press for 8s
+- Reset module: GPIO26 HIGH
+
+
+
+
+
+*More info about NB-IoT: NarrowBand-Internet of Things (NB-IoT) is a standards-based low power wide area (LPWA) technology developed to enable a wide range of new IoT devices and services. NB-IoT significantly improves the power consumption of user devices, system capacity and spectrum efficiency, especially in deep coverage. Battery life of more than 10 years can be supported for a wide range of use cases.Supported by all major mobile equipment, chipset and module manufacturers, NB-IoT can co-exist with 2G, 3G, and 4G mobile networks. It also benefits from all the security and privacy features of mobile networks, such as support for user identity confidentiality, entity authentication, confidentiality, data integrity, and mobile equipment identification. NB-IoT focuses specifically on indoor coverage, low cost, long battery life, and high connection density. NB-IoT uses a subset of the LTE standard, but limits the bandwidth to a single narrow-band of 200kHz. It uses OFDM modulation for downlink communication and SC-FDMA for uplink communications*
+
+!> **M5Stack Fire** has occupied GPIO16 / 17 to connect with the PSRAM by default, it's conflict with TXD / RXD (GPIO16, GPIO17) of NB-IoT module. Therefore, when using the NB-IoT module with the M5Stack Fire, you might have to cut the TXD and RXD from NB-IoT module and wire fly to another set of UART pin
+
+
+## Product Features
+- Serial communication: UART
+- Product Power in : 5V
+- Serial Communication: Uart2 16/17
+- 2x antenna: Spring / External
+- WUP, STA LEDs
+- 1x Power Button
+- Nano SIM
+- M5311
+ - Package: LCC
+ - Frequency Band: B3/B8/B5
+ - Tem:-40°C ~ 85°C
+ - NB-IoT support LTE Cat NB2*
+ - LTE Cat NB1 speed (kbps):
+ - Single Tone:15.625(UL)/21.25(DL)
+ - Multi Tone:62.5(UL)/21.25(DL)
+ - SMS: PDU/TEXT mode
+ - Network Protocol:
+ - IPv4/IPv6/UDP/TCP/
+ - CoAP/LwM2M/HTTP/MQTT/TLS
+ - power in:
+ - 2.1V ~ 3.6V,Typ 3.3V (Low-Voltage version)
+ - & 3.0V ~ 3.6V,Typ 3.3V (Fixed-Voltage version)
+ - Consumption:
+ - 3uA@PSM 0.4mA@ldle mode(DRx=1.28S)
+ - 167mA@Tx(23dBm/15kHzST) 54mA@Rx
+ -output power: 23dBm±2dB
+ - Certificate: CCC/SRRC/NAL/GTI
+- Product Size:54.2mm x 54.2mm x 12.8mm
+- Product weight:13.3g
+
+## Include
+
+- 1x NB-IoT PLUS module (Only China regional distribution SIM Card)
+
+## Application
+
+- Smart Wearable device
+- Smart Parking
+- Smart Meter
+- IoT in City
+
+
+### Some national carrier frequency bands
+
+only for reference
+
+
+
+
+## Links
+
+- **Datasheet** - [M5311](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/module/M5311_cn.pdf)
+
+- **AT Command** - [M5311 AT Command](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/module/M5311_AT_Command_Interface_Specification_en.pdf)
+
+
+
+## Schematic
+
+- [NB-IoT Module](https://github.com/m5stack/M5-Schematic/blob/master/Modules/module_nb_iot_sch.pdf)
+
+
+## EasyLoader
+
+
+
+
+
+>1.EasyLoader is a simple and fast program burner. Every product page in EasyLoader provides a product-related case program. It can be burned to the master through simple steps, and a series of function verification can be performed.(**Currently EasyLoader is only available for Windows OS**)
+
+>2.After downloading the software, double-click to run the application, connect the M5 device to the computer via the data cable, select the port parameters, and click **"Burn"** to start burning.
+
+!>3.The CP210X (USB driver) needs to be installed before the EasyLoader is burned. [Click here to view the driver installation tutorial](en/related_documents/M5Burner#install-usb-driver)
+
+## Code
+
+### 1. Arduino IDE
+
+*To get complete code, please click [here](https://github.com/m5stack/M5-ProductExampleCodes/blob/master/Module/NB_IOT/Arduino/NB_IOT_PLUS.ino).*
+
+```arduino
+#include
+
+void IotWriteCommand(char cmd[],char date[]){
+ char buf[256] = {0};
+
+ if(cmd == NULL)
+ sprintf(buf,"AT\r\n");
+ else if(date == NULL)
+ sprintf(buf,"AT+%s\r\n",cmd);
+ else
+ sprintf(buf,"AT+%s=%s\r\n",cmd,date);
+
+ Serial2.write(buf);
+}
+
+void get_time(void){
+ IotWriteCommand("CCLK?",NULL);
+ while(Serial2.available()){
+ uint8_t ch = Serial2.read();
+ Serial.write(ch);
+ M5.Lcd.write(ch);
+ }
+}
+
+void setup() {
+ M5.begin();
+
+ Serial.begin(115200);
+ Serial2.begin(115200, SERIAL_8N1, 16, 17);
+ pinMode(2, OUTPUT);
+ digitalWrite(2, 0);
+ delay(3000);
+ digitalWrite(2, 1);
+}
+
+
+void loop() {
+ if(M5.BtnA.wasReleased()){
+ M5.Lcd.fillScreen(TFT_BLACK);
+ M5.Lcd.setCursor(60,80,2);
+ get_time();
+ }
+ M5.update();
+}
+
+```
+
+### Pin Map
+
+
+
M5Stack
GPIO16
GPIO17
3.3V
GND
+
Module NB-IoT PLUS
RX
TX
3.3V
GND
+
+
+
+
+
+
+
diff --git a/docs/en/unit/unitv.md b/docs/en/unit/unitv.md
new file mode 100644
index 00000000..c602b98e
--- /dev/null
+++ b/docs/en/unit/unitv.md
@@ -0,0 +1,248 @@
+# UNIT-V {docsify-ignore-all}
+
+
+
+
+
+
+
+***
+
+:memo:**[Description](#Description)** :bulb:**[Quick Start](en/quick_start/unit-v/unit-v_quick_start)** :electric_plug:**[Schematic](#Schematic)** 🛒**[Purchase](https://m5stack.com/collections/m5-unit/products/unit-v)** **[EasyLoader](#EasyLoader)** :camera:**[V-Training](en/related_documents/v-training)**
+
+
+## Description
+
+**UNIT-V** is the new AI Camera powered by Kendryte K210 .An edge computing system-on-chip(SoC) with dual-core 64bit RISC-V CPU and state-of-art neural network processor.
+
+UNIT-V AI Camera features its integration with machine vision capabilities, featuring the unprocessed acceptability to AI Visioning with high energy efficiency and low cost. We co-oped with Sipeed providing the MicroPython environment makes programming on UNIT-V easier.
+
+Support MicroPython development environment, which makes the program code more concise when you use uint-v for project development.
+
+Equipped with OV2640 (2 megapixel) image sensor, it is an ideal choice for machine vision project.
+
+It is equipped with two programmable keys and an RGB LED indicator on the front for convenient status display.
+
+At the bottom, there is a PH2.0*4P interface and a type-C interface compatible with grove, which is convenient to connect with the main controllor.
+
+Support TF card to expand memory, related material and model file call more convenient.
+
+
+
+
+
+
+### Features:
+- Dual-Core 64-bit RISC-V RV64IMAFDC (RV64GC) CPU / 400Mhz(Normal)
+- Dual Independent Double Precision FPU
+- 8MiB 64bit width On-Chip SRAM
+- Neural Network Processor(KPU) / 0.8Tops
+- Field-Programmable IO Array (FPIOA)
+- AES, SHA256 Accelerator
+- Direct Memory Access Controller (DMAC)
+- Micropython Support
+- Firmware encryption support
+- Case Material: PC + ABS
+- On-board Hardware resources:
+ - Flash: 16M
+ - Camera :OV2640
+ - Button: button * 2
+ - Indicator light: RGB LED
+ - External storage: TF card/Micro SD
+ - Interface: PH2.0/compatible GROVE
+
+
+### Package Includes
+
+- 1x UNIT-V(include connecting cable)
+
+
+### SD card test
+
+UNIT-V does not currently recognize all types of MicroSD cards. We have tested some common SD cards. The test results are as follows.
+
+
+
+
+
+
Brand
+
Storage
+
Type
+
Class
+
Format
+
Test Results
+
+
+
Kingston
+
8G
+
HC
+
Class4
+
FAT32
+
OK
+
+
+
Kingston
+
16G
+
HC
+
Class10
+
FAT32
+
OK
+
+
+
Kingston
+
32G
+
HC
+
Class10
+
FAT32
+
NO
+
+
+
Kingston
+
64G
+
XC
+
Class10
+
exFAT
+
OK
+
+
+
SanDisk
+
16G
+
HC
+
Class10
+
FAT32
+
OK
+
+
+
SanDisk
+
32G
+
HC
+
Class10
+
FAT32
+
OK
+
+
+
SanDisk
+
64G
+
XC
+
Class10
+
/
+
NO
+
+
+
SanDisk
+
128G
+
XC
+
Class10
+
/
+
NO
+
+
+
XIAKE
+
16G
+
HC
+
Class10
+
FAT32
+
OK(purple)
+
+
+
XIAKE
+
32G
+
HC
+
Class10
+
FAT32
+
OK
+
+
+
XIAKE
+
64G
+
XC
+
Class10
+
/
+
NO
+
+
+
TURYE
+
32G
+
HC
+
Class10
+
/
+
NO
+
+
+
+
+## EasyLoader
+
+
+
+
+
+>1.EasyLoader is a simple and fast program burner. Every product page in EasyLoader provides a product-related case program. It can be burned to the master through simple steps, and a series of function verification can be performed.(**Currently EasyLoader is only available for Windows OS**)
+
+>2.After downloading the software, double-click to run the application, connect the M5 device to the computer via the data cable, select the port parameters, and click **"Burn"** to start burning.
+
+### FUNCTIONAL DESCRIPTION
+#### 1.1 KENDRYTE K210
+The Kendryte K210 is a system-on-chip (SoC) that integrates machine vision. Using TSMC’s ultra-low-power 28-nm advanced process with dualcore 64-bit processors for better power efficiency, stability and reliability. The SoC strives for ”zero threshold” development and to be deployable in the user’s products in the shortest possible time, giving the product artificial intelligence