The SIM7028 NB-IoT HAT is a small size, low-power, and powerful Raspberry Pi HAT with NB-IoT (Narrow-Band Internet of Things) function, supports global band and supports TCP, UDP, LWM2M, COAP, DTLS, DNS, NTP, PING, HTTP(S), MQTT(S), TLS/SSL, etc. It is designed for applications that need low delay, low power, and low throughput, also suitable for IoT applications such as meters, remote control, asset tracking, remote monitoring, remote healthcare, bicycle-sharing, and so on. Standard for Raspberry Pi 40PIN GPIO extension header, supports for Raspberry Pi series boards and Jetson Nano, etc.for Supports for TCP, UDP, LWM2M, COAP, DTLS, DNS, NTP, PING, HTTP(S), MQTT(S), TLS/SSL, etc. Onboard Type-C interface for software debugging Onboard UART control pins, for connecting with host boards like for Arduino/STM32 1x LED indicators, easy to monitor the working status Onboard USB to UART chip, the UART communication pin can be configured via jumper Onboard nano SIM card slot, compatible with for NB-IoT specific card Baudrate: 2400bps ~ 460900bps (115200bps by default) Control via AT commands (3GPP TS 27.007, 27.005, and SIMCOM enhanced AT Commands) Supports SIM application toolkit: SAT Class 3, GSM 11.11, USAT Model Number: SIM7028 NB-IoT HAT (EN) Demo Board Type: for Raspberry pi 2 b Material: plastic colour: blue Package Contents: 1 x SIM7028 Wireless Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.