Technical specifications


  • 4 x Fast Ethernet (10/100 Base-T)
  • 1 x WAN
  • Wireless access point compliant with IEEE 802.11n, g, b
  • 1 x USB 2.0 port for printers and storage media


  • Wireless router for the connection to a cable/DSL/fiber optic modem or 4G/3G dongle
  • Use of existing Internet connections via LAN and wireless LAN
  • Support for IPv6
  • Stateful Packet Inspection Firewall with port forwarding
  • Secure remote access over the Internet with VPN (IPSec)


  • Wireless radio networks compliant with 802.11n (up to 450 Mbit/s gross; 2.4 GHz) and 802.11b/g
  • With Mesh WiFi you can combine several wireless access points into one intelligent system (FRITZ!OS 6.90 and later) Find out more at
  • Secure upon delivery with WPA2 encryption
  • AVM Stick & Surf: automatic security for wireless surfing
  • WLAN button (to switch WiFi on/off manually)
  • Wi-Fi Protected Setup (WPS)
  • Wireless guest access – secure surfing for friends and visitors
  • Wireless network range extended through repeater function
  • Wireless auto channel: Automated search for wireless LAN radio channel free of interference
  • WLAN Eco for optimum performance at minimum power consumption

Home network convenience

  • Media server makes music, pictures and videos available to devices in the home network (SMB, FTP, UPnP AV)
  • With MyFRITZ!, secure access to your own FRITZ!Box from anywhere
  • FRITZ!NAS – simple, browser-based access to all files in the network, wherever they are stored
  • Networked applications such as IPTV, video on demand and media streaming
  • Parental controls, push service, cloud contacts, online storage
  • Guest access: sharing of existing Internet connection over LAN or wireless LAN
  • Wake on LAN over the Internet
  • Supports devices compliant with DLNA


  • "": multi-language user interface, for intuitive operation via Web browser
  • User interface optimized for smartphones and tablets (responsive design)
  • Free updates for new functions and security
  • Advanced view for special configuration options, help function with full-text search
  • Handy FRITZ!Apps for your smartphone: MyFRITZ!App for FRITZ! convenience on the go, and FRITZ!App WLAN, the clever Wi-Fi helper

Package contents

  • FRITZ!Box 4020
  • Power adapter with 1.5-meter cable
  • 1.8 meter network cable
  • Quick guide

Device properties

  • Dimensions (W x H x D): 166 x 120 x 48 mm
  • Suitable for tabletop or wall-mounted operation
  • Medium power consumption: 2 – 7 W


  • 5-year manufacturer’s warranty

Article number

  • 20002744