Yes! It can support 2 cameras at the same time but the camera must be from us. You can use two VLC to view their live streaming at the same time.
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