1、The development board and expansion board are used for learning, testing and development experiment. 2、The packagelist includes a ESP32 core board development board and an IO expension board, a practical and convenient combination. 3、The expansion board also comes with a dial switch, used to control the power switch. 4、You only need to input DC 7-12V voltage on the black DC header of the expansion board to power the ESP32 Core board. 5、Stable material can make sure the durability and stability of the product. Item Type: Development Board Expansion Module Set Material: PCB Purpose: Learning, Testing, Development Experiment Specifications Development Board: Microcontroller: ESP-WROOM-32 Module 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