This Wifi Shield board is based on Serial to Wi-Fi module Wizfi210 from Wiznet and it is compatible with Arduino and its clones. The Wi-Fi Shield offers you a quick easy and effective way to add Wi-Fi capabilities to Arduino. The Wi-Fi Shield allows you to achieve Wi-Fi communication via UART by sending AT commands which is an ideal solution for whom with limited or no Wi-Fi or RF expertise. The Shield supports data rates up to 11 Mbps and is compliant with 802.11b. Features: Serial(UART) to Wifi. Simple AT commands for configuration and data communication. DHCP/Static IP TCP/UDP Server/Client DNS. Operates with standard 802.11 b/g/n access points at speed up to 11 Mbps (802.11b). 802.11i Security (WEP WPA WPA2-PSK Enterprise). High-throughput hardware AES and RC4 encryption/decryption engines. Limited AP Feature (Direct Connection to IPHONE IPAD and Android-Phone without AP). Ultra low power consumption through dynamic power management. Specifications: Wifi Chip: WizFi210 Radio Protocol: IEEE 802.11b/g/n Compatible Supported Data Rates: 11 5.5 2 1 Mbps (IEEE 802.11b) Modulation: DSSS and CCK RF Operating Frequency: 2.4 - 2.497 GHz Antenna Options: Chip antenna and U.FL connector for external antenna Networking Protocols: UDP TCP/IP (IPv4) DHCP ARP DNS HTTP/HTTPS Client and Server(*) Power Consumption(Typical): Standby = 34.0 µA Receive = 125.0 mA Transmit = 135.0 mA RF Output Power (Typical): 8dBm ± 1dBm Security Protocols: WEP WPA/WPA2-PSK Enterprise EAP-FAST EAP-TLS EAP-TTLS PEAP I/O Interface: UART SPI(*) I2C(*) WAKE ALARM GPIOs System Working Voltage: 3.3V