Specifications: Device Type: 3G Modem Model: Huawei E1756C Network type: WCDMA Network protocol: HSUPA/HSDPA/UMTS/EDGE/GPRS/GSM HSUPA/HSDPA/UMTS frequency range: 900/2100MHzEDGE/GPRS/GSM frequency range: 850/900/1800/1900MHz HSDPA: 7.2Mbps HSUPA: 5.76Mbps Interface: USB 2.0 high speed Systerm requirement: Windows 2000, Windows XP, Windows Vista, Windows 7 and Mac OS x10.6 128MB of RAM 50MB free hard disk space or above USB slot. Item size: 8.7 * 2.6 * 1.1cm Item weight: 21g Package size: 11.3 * 7.1 * 3.4cm Package weight: 37g Package including: 1 * 3G USB Wireless Modem