Microcontroller: ESP-WROOM-32 

USB to Serial Port Chip: CP2102-GMR

Operating Voltage: DC 5V

Operating Current: 80mA (average)

Current Supply: 500mA (Minimum)

Operating Temperature Range: -40℃ ~ +85℃

WiFi mode: Station/SoftAP/SoftAP+Station/P2P

WiFi protocol: 802.11 b/g/n/e/i (802.11n, speed up to 150 Mbps)

WiFi frequency range: 2.4 GHz ~ 2.5 GHz

Bluetooth protocol: conform to Bluetooth v4.2 BR/EDR and BLE standards

Dimensions: 55mm*26mm*13mm

Weight: 9.3g