(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 1ACurrent consumption: 20maLow power consumption: PSM mode, typical value: 5UAFrequency band: LTE-FDD: B1, B3, B5, B8Default baud rate: 115200Network protocol: TCP/UDP/HTTP/COAP/MQTT/ONENET/Telecom Cloudcolour:bluematerial:ABSsize:31.6x28.5mmPackage Contents:1 x Development boardOnly 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.