This is a shield for the CC3000 WiFi Module. The CC3000 from TI (Texas Instruments) is a self-contained wireless network processor that makes incorporating internet connectivity into your project simple. Supply Voltage: 4.5V - 12V Host Interface: SPI @ 16MHZ Throughput (TCP): ~4Mbps IEEE 802.11 b/g Compliant WEP, WPA/WPA2 (AES and TKIP - Personal) Security Modes This shield even provides an optional feature that allows you to attach an external antenna, just in case you need a little extra power. he CC3000 Shield has a standard Arduino shield layout with 2 rows of pins on either side.