You can update firmware on your own by connecting the device and update it on our web.
But if the device works well, updating is not necessary.
5G 4G Mini Camera's Transmitter Recorder Specification:
https://www.cleverintelligenceunity.tw/en/product-656024/Wearable-5G-4G-LTE-Wi-Fi-Mini-Camera-Recorder-CBW-5G.html