This is Huawei E169 USB Modem with Voice Enable (incoming & outgoing call).

Please refer this link: http://www.itkorner.com/download/vodafone-k3520/prod_35.html

It's quick to set up and easy to use - anywhere. Use the USB Modem with your laptop or PC to surf the internet or send and receive emails. Turbo speeds up to 7.2Mbps.

Features:
HSDPA/WCDMA 2100MHZ
GSM/GPRS/EDGE 850/900/1900MHz
HSDPA 7.2Mbps
USB interface

Installs automatically and easy to use

Specification:
Dimension: 87.3mm x25.3mm x 12mm
Weight: 50g

System requirements
Windows 2000/XP/Vista or Mac OS X 128MB of RAM
50MB free hard disc space or above
USB slot

You will get:
1) 1 unit of E169G 7.2Mbps device with 3 logo
2) 1 pc long usb cable
3) 1 unit of installation guide booklet
4) 1 pc of plastic box