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Digital radio-controlled alarm clock with temperature SONIO 2.0


  • Intuitive operation with silent buttons
  • Two separate alarms
  • Alarm sound with three volume levels
  • Setting option for automatic night-light
  • Display of indoor temperature, weekday and date

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Product specification

The SONIO 2.0 radio alarm clock is a refined version of the successful TFA product.

The time is set to the second via the DCF77 signal and the change from winter to summertime is also automatic. In addition, the alarm clock displays the day of the week and the date.

With two different alarm times, e.g. for weekdays and the weekend, you always wake up at the right time. The snooze feature allows a gentle waking up. The alarm can be set at three different volume levels.

The integrated thermometer measures the room temperature and ensures a good climate in the bedroom. For a good night's sleep, the temperature should not be above 18 ° C or go below 16 ° C.

To make it easy to read the display at night, the alarm clock has a discreet and economical LED backlight, which automatically switches on in the dark via a light sensor.


  • Highest precision radio-controlled clock
  • Very easy to use
  • Two separate alarms
  • Alarm sound with 3 volume levels
  • Snooze function
  • Display of indoor temperature, weekday and date
  • Automatic backlight with light sensor

TFA Quality mark:

  • Registered TFA Design Patent
  • Eco Light Sensor

Product information for download:

Technical data

Delivery contents Alarm clock, instruction manual
Measuring range temperature -5…+50°C
Radio-controlled clock defeatable Yes
Clock Radio-controlled clock
Material Plastic
Assembling Freestanding
Power consumption Batteries
Batteries 2 x AA 1.5 V
Batteries included No
Dimensions (L) 112 x (B) 98 x (H) 98 mm
Weight 198 g