Roku RC04

The device has a Reach Xtend P/N: FR05-S1-NO-1-004, Fractus manuf., Compact Dual-Band Chip Antenna (per the FCC test report).

This device appears to be using an Ozmo Devices (now part of Atmel as of 12/19/2012) chip for the Wi-Fi capabilities. This press release seems to confirm this.

This device communicates with the main Roku player (particularly, the Roku Streaming Stick (3400R)) via Wi-Fi Direct.