A compact Arduino compatible board with an integrated W600 Wi-Fi module, making it ideal for compact and low-power IoT projects. It features 6 analog and 14 digital pins, a UART, I2C, and ICSP port. It has a USB Type-C socket for 5V power and programming, and there is also provision to connect and charge a 3.5-4.2V Li-po battery (not included) for portable applications. Arduino Zero Adafruit Feather Compatible 2.4GHz onboard Wi-Fi module supports 802.11 b/g/n Transmission frequency : 2.4GHz Width : 23.0mm Height : 17.0mm Depth : 52.0mm Weight : 5.0g Rechargeable battery required to power : Main Product Shape : Lithium Rechargeable Battery Cell/Pack Type : Lithium Polymer Batteries included : false Batteries replaceable : true USB rechargeable : true USB Charge Connection : USB Type C USB Voltage Input : 3.5V, 5.1V Microcontroller : Atmel | SMART? SAM D21 ARM Cortex-M0+ Program memory : 256.0kB Board Inputs : 6 Analogue, 14 Digital Supported Wi-Fi Modes : 802.11b, 802.11g, 802.11n