Here is a quick post showing you a photo showing the physical size comparison between Proroute H820, Proroute H685 and Teltonika RUT950 and Teltonika RUT500.
You will see that the Proroute H685 M2M router is the smallest using this quick comparison. The H685 is smaller than the other routers in width, height and depth.
The Proroute H685 is available in a 3G router and 4G router version, with each version just containing a different internal modem.
The H685 is supplied with 2 x Ethernet ports, 1 x LAN and 1 x WAN, however the WAN port can be changed to a second LAN port using the web user interface. A simple click in the settings will turn the WAN port into a fully usable LAN port. This makes the Proroute H685 a nice compact 3G or 4G router with 2 x LAN ports and WiFi with embedded modem, MiMo 3G/4G antenna connectorsand MiMo WiFi antenna connectors.