Supports SMS, phone call, GPRS, TCP/IP, DTMF, HTTP, FTPl, etc. UART interface, for connecting controller boards like Arduino/STM32 Onboard voltage translator, 3.3V by default, switch to 5V via jumper 2x LED indicators, easy to monitor the working status SIM card slot, supports 1.8V/3V SIM card
MAX705 monitoring circuit with auto-reset function Incorporates DS3231SN high precision RTC chip, with backup battery holder Reset pin selection for switching watchdog
Operating voltage: 3.3V Communication interface: I2C Logic level: 3.3V LSF0204PWR:?4-ch voltage level translator RT9193-18:?1.8V linear regulator RT9193-33:?3.3V linear regulator
LTE Cat-4, 3G, 2G Frequency Bands. LTE Cat-4: Up To 50Mbps (Uplink) / Up To 150Mbps (Downlink). 3G (HSPA+): Up To 5.76Mbps (Uplink) / Up To 42Mbps (Downlink). MP2128DT, MP1482 power chip NAU8810 audio decoder TXS0108EPWR voltage translator Satellite Bands: GPS/Beidou/GLONASS. Supports echo cancellation, noise reduction.
Driver-free, plug and play, compatible with OS including Windows, Mac OS, Linux, and Android Purpose-made for Raspberry Pi 4, compatible with other Raspberry Pi versions as well Comes with development resources and manual
4 USB Ports, Compatible with USB2.0/1.1 Onboard USB to UART, with enable/disable switch, convenient for Raspberry Pi serial debugging and avoiding conflict Onboard multi indicators, for monitoring the status of power, USB to UART, and each USB port