Features: brand new and high quality Based on 40Pin GPIO interface design, suitable for series motherboards, for Jetson for Nano Support communication protocols such as LWM2M/COAP/MQTT Interface Onboard USB interface can be used for power supply or software debugging Leads out UART control interface, which can be used in main control boards such as STM32 Onboard SIM card slot, support NB-loT special card;Controlled by serial port AT commands It has the advantages of low latency, low power consumption, wide coverage and low cost for Ideal for NB-IoT applications such as for smart meters, asset tracking and remote monitoring Specifications: Item: SIM7020C Module Expansion Board Model: AM-010 Fit: for LED Light: Yes, 2 Support serial port baud range: 300bps-921600bps (default 115200bps) Supply voltage: DC5V Logic level: 5V/3.3V Size:approx 6.5x3.1cm/2.56x1.22in Material: Metal Package Includes: 1 PC x Expansion Board note: Please allow 1-2cm errors due to manual measurement. Because of the different display of each computer, the pictures may not reflect the actual color of the item.