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Waveshare SIM7028 NB-IoT HAT Compact The product data lists anProduct descriptions Supports Global Band NB IoT Communication, Small In Size, Low Power Consumption Features At A Glance 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,