SRAM 520 kB SRAM, JST Connector 2Pin 1.25mm, Communication distance 300m, Interface UART / SPI / SDIO / I2C / LED PWM / TV PWM / I2S / IRGPIO /ADC / capacitor touch sensor / DACLNA pre-amplifier, Working voltage 2.7V-4.2V, Working temperature range -40C~+85°C, Power Supply Description, Chipset ESPRESSIF-ESP32 240MHz Xtensa® dual-core 32-bit LX6 microprocessor, FLASH QSPI flash 4MB, Charging current 500mA, Display IPS ST7789V 1.14 Inch 135*240 resolution, Power Supply USB 5V/1A, Sleep current About 120uA, Button Reset, Transmit Power 22dBm, Size & Weight 51.52x 25.04x 8.54mm(7.81g), Battery 3.7V lithium battery, USB to TTL CP2104, USB Type-C, Working current About 60MA.
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