Features: Brand new and high quality Network Protocol: Supports network IPv4/IPv6/SSL.TCP/UDP/HTTP/FTP/MQTT. Bluetooth-compatible Protocol: Complies with Bluetooth-compatible V4.2BR/EDR and BLE standards. RF: NZIF Receiver Class-1, Class-2, and Class-3 Transmitter AFH, sensitivity is -97dBm. Modular Interface: UART, SPI SDIO, I2C LED PWM, TV, PWM, I2S, IRGPIO, Capacitor for Touch Sensor, ADC, DACLNA, Pre-amplifier. WiFi Instructions: WiFi communication distance is up to 300 meters and transmission power is 22dBm. WiFi supports FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC. Specifications: Material: Metal Network Protocol: Supports network IPv4/IPv6/SSL.TCP/UDP/HTTP/FTP/MQTT RF: NZIF Receiver Class-1, Class-2, and Class-3 Transmitter AFH, sensitivity is -97dBm Chipset: TTGO Micro32 Flash: QSPI Flash 4MB Extended Function: VGA, PS/2 Modular Interface: UART, SPI SDIO, I2C LED PWM, TV, PWM, I2S, IRGPIO, Capacitor for Touch Sensor, ADC, DACLNA, Pre-amplifier Working Voltage: 2.7V-3.6V Working Current: About 30mA Sleep Current: 230uA Working Temperature Range: -40℃-85℃ Size: Approx. 67x32 mm/2.63x1.26 inches Note: 1.Please allow 1-2cm error due to manual measurement, please make sure you do not mind before ordering. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1x Control Module