Pls download "Driver" on this link:
https://www.mediatek.com/products/broadbandWifi/rt3070
150Mbps Mini Wifi Adapter USB Wi-fi Dongle 2.4G 802.11g/b/n Wireless PC LAN Network Card Wi Fi USB Receiver For Laptop
Description:
Mini portable USB 2.0 design
Wireless N speed up to 150Mbps, ideal for internet surfing and on-line gaming
Complies with IEEE 802.11n (Draft 2.0), IEEE 802.11g, IEEE 802.11b standards
Provides two work modes: Infrastructure and Ad-Hoc
MIMO technology makes wireless transmission rates up to 150Mbps
CCA technology enhances your signal stablility by automatically avoiding channel conflicts
Quick secure setup, complies with WPS for worry free wireless security
Wireless security encryption easily at a push Of QSS button
Supports 64/128-bit WEP, as well as WPA/WPA2 and WPA-PSK/WPA2-PSK encryptions
Supports WIN2K, XP, VISTA, WIN7, MAC, LINUX operating system
Supports wireless roaming technology for high-efficient wireless connections
Seamlessly compatible with 802.11b/g/n devices
Specifications:
Standards:802.11b/g/n
Interface:USB 2.0
Frequency Range:2.4 - 2.4835 GHz
Storage Temperature:-40ºC~~70ºC
Wireless Security:64/128 bit WEP,WPA,WPA2
Dimensions:15mm*34mm*9mm
Operating System:WIN2K/XP/Vista/Win7/Mac/Linux
Weight:27g

Package included:
1 x USB Wireless LAN Adapter
​No retail box will be included, but we'll pack well before shipping.