TTGO T-Koala ESP32 WiFi Bluetooth Module 4MB Development Board Based ESP32-WROVER-B

Features Espressif official ESP32-WROVER-B module 1. ESP32 version: REV1 2. FLASH: 4MB 3. Lithium battery interface, 500mA charging current 4. Compatible with Arduino, MicroPython 5. Default firmware: new MicroPytho Specification 1. Microcontroller: ESP-32 2. Board power: (USB) 5V 3. Support battery: Lipo Battery 3.7V (not included) 4. Working voltage: 3.3V 5. Flash memory: 4 M bytes 6. Dimensions: 78 x 27 mm 7. Weight: 7.8g