Feature:1. The development board and expansion board are used for DIY 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. High quality material can make sure the durability and stability of the product.Specification:Item Type: Development Board Expansion Module SetMaterial: PCBPurpose: DIY Learning, Testing, Development ExperimentSpecifications Development Board: Microcontroller: ESP-WROOM-32 ModuleUSB To Serial Port Chip: CP2102-GMRWorking Voltage: DC 5VWorking Current: 80mA (Average)Power Supply Current: 500mA (Minimum)Operating Temperature Range: -40 ~ +85WiFi Mode: Station/SoftAP/SoftAP+Station/P2PWiFi Protocol: 802.11 B/G/N/E/I (802.11n, Speed Up To 150 MbpsWiFi Frequency Range: 2.4 GHz ~ 2.5 GHzBluetooth Protocol: Comply With Bluetooth V4.2 BR/EDR And BLE StandardsExpansion Board Parameters:Power Supply Voltage: DC 7-12VWorking Current: 60mAMaximum Power: 0.3WWorking Temperature: -25 To +65.Package List:1 x Development Board1 x Expansion Board