Uno R3 Development Board with Wi-Fi for Arduino Projects Uno R3 Development Board with Wi-Fi for Arduino Projects Uno Board with ESP8266 Wifi Function UNO board with an integrated ESP8266 board, which makes it easy to connect your projects to the cloud without the need for additional modules. Features the ATmega328P and standard UNO layout, and includes a set of DIP switches to configure the serial connections.SpecificationsTransmission frequency : 2.4GHz - Transmission power : 10m - WTransmission range : 100m - Receiver Antenna Style : Internal Antenna - Transmitter Antenna Style : Internal Antenna - Length : 65mm - Width : 50mm - Height : 15mm - Weight : 25g - Packaged Volume : 0.17l - Packaged Weight : 0.03kg - Packaged Length : 9.9cm - Packaged Width : 9.9cm - Packaged Height : 1.7cm - USB Port Types : USB Micro Type BNumber of USB ports : 1 ports - Microcontroller : ATMega328 + ESP8266Supported Wi-Fi Modes : 802.11n802.11g802.11b