DCF radio clock with USB charging function and color display for digital display of time, date, temperature, and humidity. This DCF radio-controlled clock automatically adjusts to the most accurate clock in the world. The time zone can be set manually if the DCF time differs from the local time zone. It features two programmable alarm times, making it convenient for two people to wake up at different times. For short naps, simply activate the sleep timer and choose to be woken up after 5 to 120 minutes at 5-minute intervals. The Twin Power function allows for a maximum 2 A power supply for simultaneous charging of two devices. The speed alarm gradually increases the alarm tone tempo to wake sleepyheads. It includes clock, calendar, and alarm functions, with a switchable 12-/24-hour format. The date display shows the weekday, day, and month, with weekday options available in German, English, and Spanish. The snooze function is also included. The thermometer displays indoor temperature and can switch between degrees Celsius and Fahrenheit. The hygrometer shows indoor humidity. There are two brightness levels when operated by power supply, and the display is in color. Note: Batteries can also be used, but then brightness levels cannot be set.