Features: brand new and high quality for connectivity, for for Zero/Zero for W/Zero WH/2B/3B/3B+/4B,for Jetson for Nano,and any other sbc with USB interface. Supports SMS, MMS, mail, TCP, UDP, DTMF, , FTP, etc. Onboard USB Type-C interface, to test AT Commands, get Internet Data and so on. Mini PCI-E Socket for LTE 4G/3G Module throuth USB interface. for Nano SIM card slot, supports 1.8V/3V SIM card. LED indicators, easy to monitor the working status. Onboard voltage translator. Specifications: Power supply: 5V for for Quectel EC20, HUAWEI- ME909S-821, LONGSUNG U9300C, SIM7600E-H and any other Mini-PCIe LTE 4G/3G Module. Colour: black Material: plastic Package Includes: 1 x RPi 4G 3G board 4 x M2.5 copper pillars 4 x M2.5 screws 4 x M2.5 nut 1 x screwdriver 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.