1. Main chip: EPS32 dual-core
2. Protocol: Wi-Fi 802.11 b/g/n & Bluetooth 4.2 BLE & BR/EDR
3. Flash memory: 4MBytes
4. PSRAM: 8MBytes
5. Screen chip: SSD1306 I2C
6. Screen type: OLED
7. Screen resolution: 128x64
8. PIR: AS312
9. Serial port chip: CP2104
10. Charging chip: IP5306
11. Camera model: OV2640
12. Camera pixels: 2 million
Enhanced version: Added microphone, optimized circuit design