The Huawei E355 Wi-Fi modem functions both as a data card for a single user and as a mobile Wi-Fi hotspot, which can simultaneously connect up to five Wi-Fi-enabled devices. The Huawei E355 Wi-Fi modem comes with a USB interface and unlike traditional data cards which can only be powered via a computer, the Huawei Wi-Fi modem series offer users the flexibility of powering with a variety of USB chargers, offering true on-the-go connectivity.