Huawei E3276 User Guide - Page 3

1 USB Connector It connects the Internet Key to a PC, folds for safe transport, and rotates to help you get the best signal. 2 USB Connector Release Button 3 The LED light indicates if the internet key has found a network and if you have successfully connected to a mobile high speed internet network.  Blue, blinking: 4G network available.  Cyan, blinking: 4G LTE available.  Blue, solid: Connected to a 4G network.  Cyan, solid: Connected to a 4G LTE network. 4 SIM card slot 5 microSD Card Slot 6 External Antenna Ports The Internet Key can support 2 external antennas for better signal reception. 3