Working voltage: 4.75-5.25V SPI Flash: Standard 32Mbit RAM: Internal 520 KB + External 8 MB PSRAM Wi-Fi: 802.11b/g/n/e/i Bluetooth: Bluetooth 4.2 BR/EDR Support interface (2 Mbit/s): UART, SPI, I2C, PWM Support TF card: Maximum support 4G I/O port: 9 Serial port rate: Standard 115200bps Frequency range: 2400 ~ 2483.5 MHz Antenna type: Integrated PCB antenna, gain 2dBi Output: PEG (only OV2640 support), BMP, GRAYSCALE Transmission power: - 802.11b: 17 dBm (@ 11 Mbit/s) - 802.11g: 14 dBm (@ 54 Mbit/s) - 802.11n: 13 dBm (@ MCS7) Reception sensitivity: - 1 Mbit/s: -90 dBm - 11 Mbit/s: -85 dBm - 6 Mbit/s (1/2 BPSK): -88 dBm - 54 Mbit/s (3/4 64-QAM): -70 dBm - MCS7 (65 Mbit/s, 72.2 Mbit/s): -67 dBm Color: Black Material: Plastic Package Contents: 2 x ESP32-CAM-MB Module (with Camera Module OV2640) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.