It depends where you put the transmitter .
The 5G 4G Mini Camera's transmitter recorder can be wearable or put in a pouch.
If it is wrapped, the temperature will be around 40-50°C.
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