An Arduino®-Compatible 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 DIPswitches to configure the serial connections. Specifications Transmission frequency : 2.40000000GHz Transmission power : 10.00000000mW Transmission range : 100.00000000m Receiver Antenna Style : Internal Antenna Transmitter Antenna Style : Internal Antenna External port type : USB Micro Type B Length : 65.00000000mm Width : 50.00000000mm Height : 15.00000000mm Weight : 25.00000000g USB Port Types : USB Micro Type B Number of USB ports : 1.00000000 ports Microcontroller : ATMega328 + ESP8266 Fully arduino compatible : true Supported Wi-Fi Modes : 802.11n, 802.11g, 802.11b Availability : Stocked item