The stonet AC 1200 Wireless daul band range extender E3 is designed to establish a highly efficient mobile office or entertainment network with wider coverage. E3 works as a "Range Extender" in default, which will pick up the wireless signal from your main router and expand it to somewhere that your main router may not reach. Also, E1+ can support Router mode to setup a secured internal network from a DSL or cable modem. With portable design, it's a perfect choice for travelers, students, or anyone else for work or play.