Item Type: Backlight adjustment development board Chipset: ESPRESSIF-ESP32 240 MHz for Xtensa single/dual core LX6 32-Bit Microprocessor FLASH: Flash QSPI / SRAM up to 4x16 MB SRAM: 520 kB SRAM, SPRAM 8 M. KEY: Reset, start KEY: 1037, 1038, 1039 Dispaly: ILI9341 Approx. 2.2 inches (240x320) USB to TTL: CP2104 Modular Interface: SD card, for UART, for SPI, SDIO, for I2C, LED PWM, TV PWM, for I2S, IRGPIO, touch capacitive sensor, for ADC, DACLNA pre-amplifier Car Watch: 40 MHz Crystal Oscillator Operating Voltage: 2.3 V-3.6 V Working Current: about 43mA Sleep current: 1.1mA Audio Amplifier: Ns4148 Operating Temperature Range: -40℃ to + 85℃ Dimensions: Approx. 66.70x42.59x12.50mm/2.6x1.7x0.5inch Weight: Approx. 20.23g Power Supply Specification: Power Supply: USB 5V / 2A Charging Current: 2000 mAh Battery: 3.7V lithium battery Integrated Mobile Power: IP5306-I2C Wi-Fi: Standard: For FCC / CE / TELEC / KCC / SRRC / NCC (ESP32 chip) Protocol: 802.11 b / g / n / e / i (802.11n, accelerated to 150Mbps) A-MPDU and A-MSDU aggregation, support protection range less than 0.4μs Frequency Range: 2.4 GHz - 2.5 GHz (2400 M - 2483.5 M) Transmission Power: 22dBm output Remote Communication: 300m Bluetooth: Protocol: Compatible with Bluetooth v4.2BR / Standard and for EDR and BLE Radio Frequency: -98dBm sensitivity NZIF receiver, Class-1, Class-2 and Class-3 emitters AFH Audio: CVSD and SBC Audio Software Specification: Wi-Fi mode: Station / SoftAP / SoftAP + Station / P2P Security Mechanism: WPA / WPA2 / WPA2-Enterprise /for WPS Encryption Type: For AES / RSA / ECC / SHA Firmware Update: For UART download / OTA (download and write firmware via network/host) Software Development: Support cloud server/development SDK for user firmware development Network Protocol: IPv4, IPv6, for SSL, for TCP / UDP / HTTP / FTP / MQTT User Configuration: AT + Instruction Set, Cloud Server, for Android / iOSapp Operating System: For FreeRTOS 1、 It is the latest ESP32 version: REV1 which is more advanced and has more complete functions. 2、 Wireless Internet connection , meet Bluetooth v4.2BR/ for EDR and BLE standards. 3、 This development board is mini size, compact and convenient, embedded, very easy for you to install. 4、 Adopt high specification technology, elaborate welding, precise hole position, fully functional. 5、NZIF receiver with -98dBm sensitivity, Class-1, Class-2 and Class-3 emitters AFH, Audio CVSD and SBC Audio. 1 x Development Board 1 x Power Line 1 x For GROVE Cable