... /GPRS 4. LTE H8921SWCDMA/HSUPA/HSDPA/EVDO/LTE 4G VPN Router, 5-port LANs, 1-port WAN, Serial port, PPTP, L2TP, GRE, IPSec, RIP/ ... interface3. 1× RS-232 console port4. 1× SMA-K 3G antenna interface5. 1× SMA-K Wi-Fi antenna interface6. 1 ... LED status indicationSupports firmware update via WebSupports configuration file restoration and backupMetal or plastic case optional 4G LTE router with SIM card slot