UPGRADE Hollyland Tech August 01, 2022 02:53 Updated Note: V22.214.171.124 and V126.96.36.199 are the latest firmware version DOWNLOAD PATH: Firmware_Download Updates: 1. Language menu optimization Tip: There is no change in functionality and performance, so it doesn't need to upgrade if the device is working normally. Please do the operations as below: 1. Prepare a small USB disk(16/32G), then format it to FAT32. 2. Download the upgrade file to the USB disk root directory 3. Connect the USB disk to our device, it will do the upgrade automatically after turning the device on If the operations above can not solve your problem, please fill out the form below: https://tqmlk9mc66.jiandaoyun.com/f/604987c7e2b41c000797231d Related articles How to get the best wireless performance with MARS 400S PRO? User Manual Brochure How can I switch the frequency ? Brochure Comments 0 comments Article is closed for comments.