Function
1, wirelesses receive and send email
2, wireless view internet
3, wireless data transport
4, move working and administrator
5, construct enterprise big customers move data and vpn appliance
Sound communication
6, Chinese &English SMS message receive and group send
7, Use AT command to control for long-distance
8, Talk or call urgently
9, The fastest speed downlink 230.4K, uplink 84.6K
10, Sound code method: 13K QCELP (IS-733), 8K EVRC (IS-127)
11, Message service (IS-637-A): support English letter and Chinese, supply edit message content: Word and PDU
12, Point to point

Work parameter
1, Model ：VD500
2.Exterior Size：69.5(L)*45(W)*12.4(H)MM
3, Interface: USB2.0
4, Wireless Frequency: 800MHZ
Transmit RF: 824 to 849MHZ
Receive RF：869 to 894MHZ
5, Receiving Sensitivity: -106dbm
6, Storage Temperature: -30 to 70
7, Operating Temperature: -20 to 60
8, Relative Humidity: 5-85%RH
9, Work Voltage: 3.0V-3.6V
10, Work Current: Send520MA (MAX)
Receive150MA (MAX)
Dormancy18MA (MAX)
11, Support Protocol: CDMA2000 1X*RTT, IS707-A, FCC IS-95A compatible
12, Operating System: Windows 2000/XP/VISTA