Features 1.For Espressif official ESP32-WROOM-32 module, 4MB flash memory, using the latest ESP32 version of REV1. 2.Lithium battery interface, 500mA maximum charging current, stable operation, you can use with confidence. 3.Strong compatibility, it is suitable for Arduino, for MicroPython, strong performance. 4.This product is made of high quality PCB material, strong and durable. 5.The default firmware is the latest for MicroPython, which supports running for Micropython and has good performance in Python. specificationFeatures: For Espressif official ESP32-WROOM-32 module, 4MB flash memory, using the latest ESP32 version of REV1. Lithium battery interface, 500mA maximum charging current, stable operation, you can use with confidence. Strong compatibility, it is suitable for Arduino, for MicroPython, strong performance. This product is made of high quality PCB material, strong and durable. The default firmware is the latest for MicroPython, which supports running for Micropython and has good performance in Python. : Material: PCB Microcontroller: ESP-32 Board Power Supply: (USB) 5V Support Battery: For Lipo Battery 3.7V Working Voltage: 3.3V Flash Memory: 4 Mbytes Package List: 1 x Module 2 x Pin PackageList