Appearance-GSM GPRS M2M Modem                        ![]()  |                         Network                        Compliant to GSM phase 2/2+  Quad-band GSM850/900/1800/1900MHz Function data transmission, always online, auto redail up, remote wakeup or reboot via phone Power Supply voltage range 5 - 25VDC(9V suggest) Class 4 (2W) for EGSM900 Class 1 (1W) for GSM1800 Firmware Support Firmware update for better quality  |                         Dimension                        External:  Dimension: 75*50/72*16mm Weight: 200g Embedded: Dimension: 72*46*14.5mm weight: 100g Shell Steel shell: good electromagnetic shield and , heat radiate performance Electromagnetic Compatible Electrostatic Discharge (ESD): 3 class Radiated, radio-frequency, electromagnetic field immunity test: 3 class Environment Storage Temperature: -40 ~ 85°C Working Temperature: -30 ~ 75°C Humidity: 95% (non-condensing)  |