If you find a German-only manual, use Google Translate’s camera feature on your phone to overlay English text in real time.
The LU-6868 is efficient, but it likely needs a fresh AA or AAA battery (check the compartment). proxxon lu-6868 wecker manual
Primarily battery-operated (usually 1 or 2 AA/AAA) or AC adapter compatible. If you find a German-only manual, use Google