USB Charging : Built-in 2000mAh battery(fully charged working hours: 6-7 hours), and the charging method is very convenient , computer, notebook, car charger, charging treasure, etc. can provide charging for the router.Wide Applicability: This 4G wireless router applicable frequency bands are ①FDD-LTE: B1/B3/B5/B7/B8/B20 ②TDD-LTE: B38/B40/B41 ③WCDMA: 2100/1800/850/900 ④GSM: 850/900/1800/1900. It means that you can use this router to connect to the internet in any region and country in the world that supports these bands. All you need to do is insert your universal ordinary SIM card and you're ready to enjoy the internet.(Warm tip: This router is shipped without a SIM card）Portable Size, Easy to Operate: This wifi router supports both 3G/4G networks. With the small size, easy to carry.Simple operation, strong practicality.Support to restore the factory settings, you can make this setting when necessary, clear all the data, re-set the router.Support for custom languages(Arabic, English, French, German, Italian, Portuguese, Spanish)Powerful Compatibility: This mini portable 4G router supports tablet ,laptop, notebook and different types of wi-fi devices connect to access to internet. Supports up to 10 users access simultaneously and also work as USB modem (for Windows PC only ), speed: 50M UL/150M DL, stable signal.