MINI TRAVEL ROUTER: Convert a public network(wired/wireless) to a private Wi-Fi for secure surfing. Tethering, 3G/4G USB Modem Compatible. Powered by any laptop USB, power banks or 5V DC adapters (sold separately). 39g (1.41 Oz) only and pocket friendly. OPEN SOURCE & PROGRAMMABLE: OpenWrt pre-installed, USB disk extendable. OPENVPN CLIENT: OpenVPN client pre-installed, compatible with 20+ VPN service providers. LARGER STORAGE & EXTENSIBILITY: 128MB RAM, 16MB NOR Flash + 128M NAND Dual flash, dual Ethernet ports, UART and GPIOs available for hardware DIY. PACKAGE CONTENTS: GL-AR300M mini router (1-year Warranty), USB cable, User Manual.