Working voltage: 4.75-5.25VSPIFlash: Standard 32MbitRAM: internal 520 KB + external 8 MB PSRAMWi-Fi: 802.11b / g / n / e / i /Bluetooth: Bluetooth 4.2BR / and standardSupport interface (2 Mbit / s):UART, SPI, I2C, PWMSupport TF card:maximum support 4GI / O port:9Serial port rate:standard 115200bps range:2400 ~ 2483.5 MHzAntenna shape: integrated PCB antenna, gain 2dBi output :PEG (only OV2640 support), BMP, GRAYSCALETransmission power:802.11b:17 2 dBm (@ 11 Mbit / s)802.11 g:14 2 dBm (@ 54 Mbit / s)802.11n:13 2 dBm (@ MCS7)Reception sensitivity:, 1 Mbit / s: -90 dBm, 11 Mbit / s: -85 dBm6 Mbit / s (1 / 2BPSK): -88 dBm54 Mbit / s (3/464-QAM): -70 dBmMCS7 (65 Mbit / s, 72.2 Mbit / s): -67 dBmColour:blackMaterial:plasticPackage Contents:2 * 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 in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. YJL official store