Features
4G/LTE (Cat 4), 3G, 2G connectivity
Rugged aluminium housing
Easy to use, secure and feature rich OpenWRT based operating system
Wide range of supported power supply voltages
Small size, easy installation
Compatible with Teltonika Remote Management System
https://teltonika-networks.com/product/trb140/

Features
4G/LTE (Cat 1), 3G, 2G connectivity
Rugged aluminum housing
Equipped with RS232 for serial communication
Wide range of supported power supply voltages
Compact size, easy integration
Teltonika Remote Management System compatible
https://teltonika-networks.com/product/trb142/

Features
Industrial LTE Cat 1 Gateway Board TRB145 is equipped with RS485 Interface
Digital Inputs/Outputs and micro-USB port
TRB145 compact design makes this Gateway perfect for an application where a sole gadget must be remotely controlled over RS485 interface.
TRB145 is engineered to be used in Industrial applications therefore it has a wide range of software features such as SMS control
Firewall, Open VPN, IPsec, RMS and FOTA support.
https://teltonika-networks.com/product/trb145/

Features
Industrial LTE Cat 4 modem
Support for 2G and 3G technologies
Contains two SIM slots
Operating system: RutOS (OpenWrt based Linux OS)
Interface: serial RS-232, RS-485, Ethernet (10/100 Mbps), 2 x SMA male
https://teltonika-networks.com/product/trb245/

Features
Ethernet interface
Technologies: LTE (Cat M1), NB-IoT, EGPRS
Dimensions: 83 x 74,2 x 25 mm
Wide range of power supply voltages
Teltonika Remote Management System compatible
RutOS – easy to use, secure and feature rich Operating System
https://teltonika-networks.com/product/trb255/