Features: 1.Title Design: When using the development board for development and debugging, the standard title on both sides can make your operation more concise and convenient. 2.Strong Applicability: Developers can connect peripheral devices as needed, which is convenient and fast, and has strong applicability. 3.Dial Switch: The development expansion board is equipped with a dial switch to control the power switch. 4.Uses: Suitable for operation, learning and development of college students, engineers, technicians, factory workers, DIY, electronics enthusiasts, etc. 5.Premium Materials: Made of PCB, it is strong, durable, not easy to be damaged, and has a long service life. specification:Item Type: Development Board Material: PCB Applicable: for ESP32IO Expansion Board Connection Technology: Wifi Wireless Type: 802.11n, BT, 802.11b Uses: Suitable for Operation, Learning and Development of College Students, Engineers, Technicians, Factories, Diy, Electronics Enthusiasts, Etc. Power Supply Voltage: DC 7-12v Working Current: 60ma Maximum Power: 0.3w Working Temperature: -25-65 Wifi Mode: Station SoftAP SoftAP+Station P2P Wifi Frequency Range: 2.4 Ghz-2.5 Ghz BT Protocol: Compliant with BT V4.2 BR EDRdr and Ble Standards PackageList:1 x DevelopmentBoard