This model is frequently rebranded. Below is the direct link to the Hopeword H10515 manual (PDF), which matches the specifications for the DCF version you requested.
: H10515/DCF Sensor Data Repository (GitHub) — Useful if you are trying to read the sensor data using a Raspberry Pi or similar device. wireless weather station h10515 dcf manual link
If you are unable to access the link, the following steps are standard for the H10515 and similar DCF models: This model is frequently rebranded
: You can find digital copies of the manual on Google Drive (Link 1) and Google Drive (Link 2). wireless weather station h10515 dcf manual link