[Transmission type]：NB-IoT

[Power]：23dBm

[Size]：42*40*9.7mm

[Interface]：UART

[Weight]：11.7±0.1g

[Introduction]：E840-TTL-NB03 is developed for serial port devices and network servers to transmit data through the network. It supports B8 frequency band. It can be easily set up with simple AT commands. It can be used to realize serial-to-network two-way data transparency transmission.