LDW931 is a 4G LTE USB wifi router , it takes through USB port , work as wifi router . also can be pluged into computer USB port , work as USB modem . plug&play , doesn't need CD driver .Pls make your computer's software or Firewalls allow the USB modem driver to install ,otherwise it can't work as USB modem .This 4g USB modem do not include , user need to buy a NANO from local operators to this device .This device offers mobile high speed 4G LTE Internet access service,It works in via standard usb port, or outdoor with powerbank via standard usb port.This wifi dongle support both 3G&4G networks.Support up to 10 users to access the Wi-Fi network at the time.Small ,easy to carry . USB , plug&play . easy to .American version: FDD1900/1700/850/2600MHZ (/b4/b5/b7)American version works in American countries .(such as USA, Chile, Canada, Mexico, , Bolivia, Colombia, Venezuela, Ecuador, Guatemala, Honduras, Nicaragua, , Peru, Uruguay, Paraguay, Dominica)You can check frequency bands in below link ,https://.frequencycheck./countries ,Laptop, computer, books ,mobile phones and different types of WI-FI devices can to the 4G WiFi routert to access to Internet .High speed LTE Chipset, Support TDD-LTE/FDD-LTE/UMTS/ networksMulti languagesPlug&Play,No need CD-ROM,No Driver Installation.Up to 10 users access to WiFiSuper tiny 4G USB dongle ; Innovative Nano SIM-in-USB technologySupport Win2000/2003/xp/Vista /Win 7/Win 8/Win 10/Linux input :5V1AWorking temperature : -10C~45CColour:WhiteMaterial:plasticSize:88 x 28 x 12.3mmPackage Contents:1 x WiFi RouterOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.