1.Voltage Range:5-18V.

2.Lithium Battery Interface Voltage:3.4-4.4V.

3.Operating Temperature:-40to+85℃.

4.Storage Temperature：-45to+90℃.

5.Size:50*50mm.

6.Bands: GSM 850,EGSM900,DCS 1800,PCS 1900.

7.Class 4(2W)at GSM 850 and EGSM 900.

8.Class 1(1W)at DCS 1800 and PCS 1900.

9.GPRS Downlink Data Transmission：max.85.6kbps.

10.GPRS Uplink Data Transmission: max.85.6kbps.

11.Support SIM card:1.8V,3V.

12.Support 2G/3G/4G Mobile Unicom card.

13.Serial Port:Support baud rate auto recognization.