(1) Super coverage: Compared with GPRS, it increases the signal gain by 20db. (2) Ultra-low power consumption: The target for terminal power consumption is: based on AA (5000mAh) batteries, the service life can exceed 10 years. (3) Large connections: One sector can support tens of thousands of connections, supporting low latency sensitivity, ultra-low equipment costs, low equipment power consumption and optimized network architecture. (4) Ultra-low cost: NB-IoT does not need to rebuild the network, and the radio frequency and antenna are basically multiplexed. Power supply: 5V 1A<br><br>Current consumption: 20ma Low power consumption: PSM mode, typical value: 5UA Frequency band: LTE-FDD: B1, B3, B5, B8 Default baud rate: 115200 Network protocol: TCP/UDP/HTTP/COAP/MQTT/ONENET/Telecom Cloud colour:blue material:ABS size:31.6x28.5mm<br><br>Package Contents: 1 x Development board<br><br>Only the above package content, other products are not included. Note: Light shooting 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.