1The development board and expansion board are used for DIY learning, testing and development experiment. 2The packagelist includes a ESP32 core board development board and an IO expension board, a practical and convenient combination. 3The expansion board also comes with a dial switch, used to control the power switch. 4You only need to input DC 7-12V voltage on the black DC header of the expansion board to power the ESP32 Core board. 5High quality material can make sure the durability and stability of the product. Item Type: Development Board Expansion Module Set Material: PCB Purpose: DIY Learning, Testing, Development Experiment SpecificationsDevelopment Board: Microcontroller: ESP-WROOM-32 Module USB To Serial Port Chip: CP2102-GMR Working Voltage: DC 5V Working Current: 80mA (Average) Power Supply Current: 500mA (Minimum) Operating Temperature Range: -40 ~ +85 WiFi Mode: Station/SoftAP/SoftAP+Station/P2P WiFi Protocol: 802.11 B/G/N/E/I (802.11n, Speed Up To 150 Mbps WiFi Frequency Range: 2.4 GHz ~ 2.5 GHz Bluetooth Protocol: Comply With Bluetooth V4.2 BR/EDR And BLE Standards Expansion Board Parameters: Power Supply Voltage: DC 7-12V Working Current: 60mA Maximum Power: 0.3W Working Temperature: -25 To +65 1 x Development Board 1 x Expansion Board