the wireless router dir-806a includes a built-in firewall.built-in yandex.dns service protects against malicious and fraudulent web sites and helps to block access to adult content on children's devices.simultaneous dual band operation in 5ghz band and 2.4ghz bandproduct dimension:?20.5 x 13.6 x 3.3 cm; 230 gramsproduct descriptionwireless connection rate up to 750mbps. simultaneous dual band operation in 5ghz band and 2.4ghz band, 802.11a/b/g/n/ac compatible. all needed functions for up-to-date networking. the wireless router dir-806a includes a built-in firewall. built-in yandex.dns service protects against malicious and fraudulent web sites and helps to block access to adult content on children's devices. two external non-detachable antennas (5dbi gain for 2.4ghz and 5ghz)?one internal antenna (3dbi gain for 2.4ghzset contains:router, ethernet cable, power adapter