Original HUAWEI E583C Portable HSPA WIFI Wireless Modem Router + Free Velvet Pouch Bag Technical standard: WAN: HSPA/UMTS/EDGE/GPRS/GSM; WLAN: IEEE 802.11b/g Operating frequency: HSPA/UMTS: 2100/900MHz; EDGE/GPRS/GSM: 850/900/1800/1900MHz; WLAN: 2.401GHz~2.482GHz Internal memory: 128MB Flash, 64MB Memory Battery : Type: Li (Rechargeable); Capacity: 3.7V, 1400mAh; Maximum working time: 4 hours; Maximum standby time: 100 hours External interfaces: USB interface: Mini USB; Standard micro SD card interface; SIM/USIM card: standard 6-pin SIM card interface