TTGO T-Controller ESP32 OLED Development Board with Organic Light Emitting Diode WIFI Description:Standard FCC/CE/TELEC/KCC/SRRC/NCC,protocol 802.11 b/g/n/e/i (802.11n,speed up to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4μS Protection interval,frequency range 2.4GHz-2.5GHz(2400M-2483.5M),Transmit Power 22dBm,communication distance 300m. Bluetooth Description:protocol meet bluetooth v4.2BR/EDR and BLE standard,radio frequency with -98dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH,audio frequency CVSD&SBC audio frequency Software specification Description:wifi Mode Station/SoftAP/SoftAP+Station/P2P,security mechanism WPA/WPA2/WPA2-Enterprise/WPS,Encryption Type AES/RSA/ECC/SHA,firmware upgrade UART download/OTA(Through network/host to download and write firmware),Software Development Support cloud server development /SDK for user firmware development,networking protocol,IPv4,IPv6,SSL,TCP/UDP/HTTP/FTP/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/SRAM, up to 4 x 16 MB SRAM 520 kB SRAM Button reset,boot Button OK,UP,DOWN,LEFT,RIGHT switch BAT switch dispaly 0.96 SSD1306 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.