Features of the ESP32 D1 Mini Bluetooth+WiFi Board:

• Supply Voltage: 3.0 V ~ 3.6 V (VCC), 3.0V – 5.0V (USB and 5V)
• Operating Voltage: 3.3V (GPIO pins)
• Power Consumption:
  • 30mA – 80mA (idle)
  • 100mA – 240mA (WiFi/Bluetooth RX/TX)
  • 10µA – 150µA (Deep Sleep)
  • 5µA (RTC Timer Only)
• Peripheral Interfaces: UART, SPI, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC
• WiFi – 802.11 b/g/n (802.11n up to 150 Mbps) @2.4 GHz ~ 2.5 GHz
• Bluetooth – Bluetooth v4.2 BR/EDR and BLE specification
• Operating Temperature: –40 °C ~ +85 °C
• 40 Available GPIO Pins
• ESP32-WROOM-32 Datasheet, ESP32 General Datasheet