Product Name: 4G Cat, 1 Core Board Product model: -HCore-A7670C series Packaging form: Pin type 48 PIN (2.54mm) Power supply: 5V~16V UART: TTL (default 3.3V, can support 5V), baud rate (bps): 9600192003840057600115200230400, etc LED lights: power indicator light, network indicator light SIM interface: Self ejecting Micro-card holder USB interface: USB 2.0 (only supports slave mode) Antenna: Seat (1st Generation) Working temperature: -30 ° C~80 ° C (maximum working temperature -40 ° C~85 ° C) Storage temperature: -40 ° C~+85 ° C Supporting operators: China Mobile 4G, 4G, China 4G Network frequency band: LTE-TDD: B34/B38/B39/B40/B41; LTE-FDD: B1/B3/B5/B8 Communication speed: Maximum 10Mbps (DL)/Maximum 5Mbps (UL) Network protocols: UDP//NTP//HTTP/MQTT, etc Cloud platform: AliCloud/Tencent Cloud/OneNET/Baidu AI Cloud : Supports /Linux/Android Color: Green Material: PCB Package Contents: 1 * 4G Cat 1 * Core Board 2 * row needles 1 * FPC soft board 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.