Technical specifications


  • Four configurable buttons for convenient operation of FRITZ! Smart Home products
  • Controls and turns the new FRITZ!DECT 500 smart LED bulb on and off
  • Temperature and humidity sensor; the measurements are shown on the display
  • Temperature sensor for managing FRITZ!DECT 302, 301 and 300 radiator controls
  • Turns the FRITZ!DECT 200 and 210 smart plugs on and off
  • Controls and turns individual devices or groups on and off
  • See what's going on in your Smart Home with the high-resolution e-paper display
  • Can be used with any FRITZ!Box with a DECT base station via DECT ULE technology
  • Mount anywhere with the magnetic wall bracket
  • Automatic updates for new features
  • Easy to set up and optimized for use with a FRITZ!Box


Device properties

  • Dimensions (W x H x D): 69 x 69 x 18 mm
  • Weight: 75 g
  • Ready for use at an ambient temperature of 10°C to 40°C
  • Wireless standard: DECT ULE
  • Wireless range: up to 40 meters indoors
  • Frequency range: 1880 – 1900 MHz
    Maximum transmitter power: 250 mW

Package contents

  • FRITZ!DECT 440
  • Quick guide
  • Wall mount
  • 1 x adhesive strip
  • 2 x screws / 2 x wall plugs
  • 2 x AAA batteries


  • You can mount the FRITZ!DECT 400 with the adhesive strips or screws supplied
  • You can also place the button wherever you want, without mounting it

System requirements

  • FRITZ!Box with DECT
  • FRITZ!OS 7.50 or later

Article number

  • 20002905