USR-G806s 4G Industrial LTE VPN Router for IoT Device Serial Port RS485 LAN WAN to 4G WiFi Converter Support Modbus RTU to TCP - AliExpress
R1510 | VPN Router | 4G LTE Router | Robustel
GL.iNet GL-E750 (Mudi) 4G LTE OpenWrt VPN Router, T-Mobile Only, 128GB Max MicroSD, 7000mAh Battery, OpenVPN, WireGuard, Tor, Router that You can Program (EC25-AFFA Module), North America Only - Walmart.com
Proxicast: EtherLINQ 4G/LTE SIM Router with WiFi, VPN, Firewall