WIFI Standard FCC/CE/TELEC/KCC/SRRC/NCC,protocol 802.11 b/g/e/i (802.11n, to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4S Protection interval,frequency range 2.4GHz-2.5GHz(2400M-2483.5M),Transmit Power 22dBm,communication distance 300m. Bluetooth protocol meet bluetooth v4.2BR/ and BLE standard,radio frequency with -98dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter ,audio frequency CVSD& audio frequency Software specification wifi Mode Station/SoftAP/SoftAP+Station/P2P,security mechanism WPA/WPA2/WPA2-Enterprise/WPS,Encryption Type //ECC/SHA,firmware upgrade UART download/OTA(Through network/host to download and write firmware),Software Development Support cloud server development /SDK suitable for user firmware development,networking protocol,IPv4,IPv6,,UDP/HTTP//MQTT,User Configuration AT + Instruction set, cloud server, android/iOSapp.OS FreeRTOS Hardware Specifications Chipset ESPRESSIF-WROVER-B 240MHz Xtensa single-/dual-core 32-bit LX6 microprocessor FLASH QSPI flash/, up to 4 x 16 MB 520 kB Button reset,boot Button OK,UP,DOWN,LEFT,RIGHT switch BAT switch dispaly 0.96 Power indicator lamp red USB to TTL CH9102F QFN24 Modular interface UART,SPI,SDIO,I2C,LED PWM,TV PWM,I2S,IRGPIO,capacitor touch sensor,ADC,DACLNA pre-amplifier on-board clock 40MHz crystal oscillator working voltage 2.3V-3.6V working current about 60mA sleep current 470uA working temperature range -40 - +85 size 108.51mmx29.01mm Power Supply Specifications Power Supply USB 5V/1A charging current 1000mA Colour:As Shown Material:Plastic Package Contents: 1x ESP32 Development Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.