M2M Industrial GPRS Router with one Ethernet and one RS-232 or RS-485 port. Band support: dual-band EGSM900/GSM1800MHz and quad-band GSM800/900/1800/1900MHz. Features:All wireless modules are certified by the CGD or FCC certification or CE certificationIntelligent anti-dropped, support online testing, online maintenance, automatic redial, and ensure router is always onlineOnline maintenance patents: Intelligent anti-dropped, online testing, onlin..