keyes ESP32 Core board is a mini development board designed based on ESP-WROOM-32 module. This development board leads out 2.54mm pitch headers from I/O to both sides. The users can connect peripheral devices on their needs. When using and debugging, the standard headers on both sides can make your operation more concise and convenient. The ESP-WROOM-32 module is the leading WiFi + Bluetooth solution with less than 10 external components. It integrates antenna switches, RF balun, power amplifiers, low noise amplifiers, filters and power management modules. At the same time, it also adopts TSMC low-power 40nm technology. The cost-effective and radio frequency performance makes it safe and reliable to expand various applications. Microcontroller: ESP-WROOM-32 module USB to serial chip: CP2102- Working voltage: DC 5V Working current: 80mA (average) Supply current: 500mA (minimum) Operating temperature range: -40C ~ +85C WiFi mode: Station/SoftAP/SoftAP+Station/P2P WiFi protocol: 802.11 b/g/e/i (802.11n, to 150 Mbps WiFi frequency range: 2.4 GHz ~ 2.5 GHz Bluetooth protocol: comply with Bluetooth v4.2 BR/ and BLE standards ESP32-IO Expansion Board: Technical parameters: Power supply voltage: DC 7-12V Working current: 60mA Maximum power: 0.3W Working temperature: -25 to +65 attribute: ROHS Material: plastic colour: red Package Contents: 1 x ESP32 Core board 1 x Expansion Board Only the above package content, other products are not included. Note: Light 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.