ESP32-WROOM-32E WiFi + BT + BLE Module Electronics • Dev board
Operating voltage/Power supply: 3.0 ~ 3.6 V
Operating ambient temperature: 85 °C version: –40 ~ 85 °C
40 MHz Internal crystal oscillator
Bluetooth V4.2 BR/EDR and Bluetooth LE specification
WiFi 802.11b/g/n
https://www.ktron.in/product/esp32-wroom-32e/