4G LTE USB Adapter - LTE Frequency bands 1800/2600/800 MHz - Quad-band GSM/GPRS/EDGE - UMTS 900/2100 MHz - LTE 3GPP Rel-9 FDD-LTE Cat.4 - Downlink: Up to 150 Mbps Uplink: Up to 50 Mbps - DC-HSPA+ - Downlink: Up to 42 Mbps Uplink: Up to 7.76 Mbps - Plug and Play, automatic software/driver installation - Windows XP/Vista/7/8, Mac OS X 10.5 or higher requires 50 MB disk space and at least 128 MB RAM free. - LTE Power Class 3 - USIM slot, Standard 6-Pin SIM card interface - Supports microSD cards up to 32GB - SMS Manager – Create, edit, forward and send messages. Inbox, outbox, draft and sent folders. - Dimensions (L x W x H) 103 x 34 x 11.5mm.