Appearance - M300d 3.5G Router | Network GSM phase2/2+ GSM 850MHz EGSM 900MHz DCS 1800MHz PCS 1900MHz UMTS/WCDMA/HSDPA: 2100Mhz or 850/900/1900/2100Mhz | 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) |