---
title: "CJC400/400P firmware"
slug: "cjc400400p-firmware"
updated: 2023-11-03T20:58:33Z
published: 2023-11-03T20:58:33Z
canonical: "ametawiki.ametagroup.com/cjc400400p-firmware"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://ametawiki.ametagroup.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CJC400/400P firmware

#### Compatible model: CJC400/400P

#### Release date: 2023-08-24

:::(Warning) (**For SD card upgrade:**)
[update.zip](https://drive.google.com/file/d/1OkxfjTAg2irAVA-u8B_mtHvjMNFUMeBo/view?usp=sharing){target=`_blank`}
:::
:::(Error) (**For PC usb upgrade(specific usb wire needed):**)
[KMC28_JC400_WABA_STD_V4.4.1.6_230824.1936.zip](https://drive.google.com/file/d/1qIshS5-hHXs6-BDp12NC70XYKD8123WB/view?usp=sharing){target=`_blank`}
:::


* * *

### Description:
> **If you using SD card upgrading, please make sure there is only one file "update.zip" in your SD card, no change name allowed, no other file allowed. Insert SD card contains the firmware file to the CJC400P, and power it up, it will upgrade automatically for about 10 minute.**