Rn-171 Rn-xv Wifly Wireless Wifi Module (With Antenna) Compatible Xbee Interface Ordinary 802.15.4 package 4uA sleep mode, 38mA active ultra-low power consumption power: 0dBm to 12dBm Hardware Interface: TTL UART Containing the TCP / IP protocol stack, including DHCP, UDP, DNS, ARP, ICMP, HTTP client, FTP client and TCP